2. Table 1 shows the number of pupils attending a motivation camp.
Two pupils from the group are required to take part in a show.
a) If a pupil is chosen at random from school A and another one from school B, calculate the probability that both are girls.
b) If two pupils are chosen at random from the group of boys, calculate the probability that both are from the same school.
Answers
a) The probability that both are girls is of: 21/150.
b) The probability that both are from the same school is of: 0.7333 = 73.33%.
How to obtain the probabilities?The probabilities are obtained as the division of the number of desired outcomes by the number of total outcomes.
For item a, the outcomes are given as follows:
One girl from school A -> 7/15 probability.One girl from school B -> 3/10 probability.Hence the probability that both are girls is of:
p = 7/15 x 3/10 = 21/150.
The probability that the two boys are from the same school can be given by these two cases:
School A: 8/15 x 7/14.School B: 7/10 x 6/9.Then the probability is of:
p = 8/15 x 7/14 + 7/10 x 6/9 = 0.7333 = 73.33%.
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Related Questions
What is the equation in slope-intercept form of the line that passes through the points (6,1) and (3,3)?
y=−2/3x+5y
y=−2/3x−10y
y=2/3x+2y
y=2/3x−2
Answers
The equation in slope intercept form of the line that passes through the points (6,1) and (3,3) is y = - 2 / 3 x +5
How to find equation in slope intercept form?The equation of a line in slope intercept form can be represented as follows:
y = mx + b
where
m = slopeb = y-interceptTherefore, the equation in slope-intercept form of the line that passes through the points (6,1) and (3,3) can be represented as follows;
let's find the slope
m = 3 - 1 / 3 - 6
m = - 2 / 3
Hence, let's find the y-intercept as follows;
using (3, 3)
y = - 2 / 3 (x) + b
3 = - 2 / 3 (3) + b
3 + 2 = b
b = 5
Therefore, the equation of the line is y = - 2 / 3 x +5
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The formula A=23.1 e^{0.0152t} models the population of a US state, A, in millions, t years after 2000.
a. What was the population of the state in 2000 ?
b. When will the population of the state reach 28.3 million?
a. In 2000 , the population of the state was ? million.
Answers
We want to study the population formula of a given US state according to exponential equation.
a) 23.1 millions.
b) in 2013 - 2014
What is exponential equation?
The exponential function may be a function denoted by f(x)=\exp or e^. Unless otherwise fixed, the term usually refers to the positive-valued operate of a true variable
Main body:
The population state is:
A = 23.1*e^(0.0153*t)
In millions.
Where t represents the number of years after 2000.
a) For the population at the year 2000, we need to evaluate the function at t = 0 (2000 is 0 years after 2000).
A(0) = 23.1*e^(0.0153*0) = 23.1
The population at year 2000 was 23.1 millions.
b) Now we want to solve:
A(t) = 28.3 = 23.1*e^(0.0153*t)
28.3/23.1 = e^(0.0153*t)
1.23 = e^(0.0153*t)
Now we can apply the natural logarithm to both sides:
ln(1.23) = ln( e^(0.0153*t) )
ln(1.23) = 0.0153*t
ln(1.23)/0.0153 = t = 13.5
Hence, 13.5 years after 2000 the population will be 28.3 million.
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what is the importance of knowing the history of the earth
Answers
Knowing the history of the Earth is of the utmost importance to understand how it got to now and to know where we are going.
¿What is the history of the Earth?The history of the Earth is nothing more than the set of events, occurrences and phenomena that the same happened from its origin to the present.
Knowing the history of the Earth is very important because:
It gives us knowledge about the development of the Earth and different associated elements.It allows us to understand different elements of the universe. It allows us to study and analyze different events associated with man and life.¡Hope this helped!
Answer:
The history of the Earth is nothing more than the set of events, occurrences and phenomena that the same happened from its origin to the present.
Find the equation of the line with slope 0 and passing through (-5,16). Write the equation in standard form.
Answers
Lines with a slope of zero can be thought of as y = 0x + b, which simplifies to just "y = b".
In this case, your equation is y = 16.
If you want to force it explicitly into standard form, you could write it at
0x + 1y = 16
Round 54.71 to the nearest tenth
Answers
Answer:
the digit 1 is less than 5, so we round 54.71 down to 54.7.
Step-by-step explanation:
Assume the acceleration of the object is a(t) = −32 feet per second per second. (Neglect air resistance.)
A balloon, rising vertically with a velocity of 16 feet per second, releases a sandbag at the instant when the balloon is 48 feet above the ground.
(a) How many seconds after its release will the bag strike the ground? (Round your answer to two decimal places.)
(b) At what velocity will it strike the ground? (Round your answer to three decimal places.)
Answers
(a) 2.79 seconds after its release the bag will strike the ground.
(b) At a velocity of 73.28 ft/second it will hit the ground.
What is velocity?
We are given that a balloon, rising vertically with a velocity of 16 feet per second, releases a sandbag at the instant when the balloon is 80 feet above the ground.
Assume the acceleration of the object is a(t) = −32 feet per second.
(a) For finding the time it will take the bag to strike the ground after its release, we will use the following formula;
[tex]s=u t+\frac{1}{2} a t^2[/tex]
Here, s= distance of the balloon above the ground =-80 feet
[tex]$\mathrm{u}=$[/tex] intital velocity =16 feet per second
[tex]$\mathrm{a}=$[/tex]acceleration of the object =-32 feet per second
[tex]$\mathrm{t}=$[/tex] required time
So, [tex]$s=u t+\frac{1}{2} a t^2$[/tex]
[tex]$$\begin{aligned}& -80=(16 \times t)+\left(\frac{1}{2} \times-32 \times t^2\right) \\& -80=16 t-16 t^2 \\& 16 t^2-16 t-80=0 \\& t^2-t-5=0\end{aligned}$$[/tex]
Now, we will use the quadratic D formula for finding the value of t, i.e;
[tex]t=\frac{-b \pm \sqrt{D}}{2 a}[/tex]
Here, a=1, b=-1, and c=-5
Also, [tex]$\mathrm{D}=b^2-4 a c=(-1)^2-(4 \times 1 \times-5)=21$[/tex]
So, [tex]$t=\frac{-(-1) \pm \sqrt{21}}{2(1)}$[/tex]
[tex]t=\frac{1 \pm \sqrt{21}}{2}[/tex]
We will neglect the negative value of t as time can't be negative, so;
[tex]t=\frac{1+\sqrt{21}}{2}=2.79 \approx 3 \text { seconds. }[/tex]
Hence, after 3 seconds of its release, the bag will strike the ground.
(b) For finding the velocity at which it hit the ground, we will use the formula;
v=u+a t
Here, v= final velocity
So,[tex]$v=16+(-32 \times 2.79)$[/tex]
v=16-89.28=-73.28 feet per second.
Hence, the bag will hit the ground at a velocity of [tex]$-73.28 \mathrm{ft} / \mathrm{second}$[/tex].
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5(g + 8) - 7 = 117 - g = 14
14 is the answer
Answers
A circle has a circumference of 20 m.
Work out the radius of the circle.
Give your answer correct to 1 decimal place.
Answers
The required radius of the circle is given as 3.18 m.
Given that,
A circle has a circumference of 20 m. the radius of the circle is to be determined.
Perimeter is the measure of the figure on its circumference.
Here,
The perimeter of the circle = 20m
2πr = 20
r = 20/2π
r = 3.18 m
Thus, the required radius of the circle is given as 3.18 m.
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jon making a dog house to put in his backyard he uses more than 24 feet of wood for the project
Answers
Answer:
thanks.
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Determine the value for m in the equation 1.3m = 0.78.
A. 10.14
B. 6.50
C. 0.60
D. 0.06
Answers
Answer:
0.60
Hope this helps, I believe in you!
Answer: The answer is C 0.60
Step-by-step explanation:
The table represents some points on the graph of a linear function.
Which equation represents the same relationship?
x-2y-1=0
2x-y +7=0
y+3= 1/2 (x - 5)
y-15 = 2(x-31)
Answers
The equation that represents the same relationship is equation 1: x-2y-1=0
How to find the equation?We should know that an equation is a mathematical statement that shows the equality of two sides o a statement.
From the given equation:
x-2y-1=0
If we input the various values of x such as -5, 7,31,42 into the equation we are going to obtain the corresponding values of y as indicated in the table
x-2y-1=0
Rewrite the equation
x-1=2y
⇒2y=x-1
=2y=-5-1
y=-3
Also, 2y=7-1
2y=6
y=3
Input the value 31 into the equation or x
2y=31-1
2y=30
y=15
Input the value 45 or x in the equation
2y=45-1
2y=44
y=22
In conclusion, the equation x-2y-1=0 represents the the same relationship in the table
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TEXT ANSWER
An airplane has stopped to refuel. Fuel is being added to the plane's gas tank at a constant
rate. After 13 minutes, there are 32,882 gallons of fuel in the plane; after 31 minutes, there
are 34,902.5 gallons in the plane. Write the y = mx + b equation that describes this
scenario.
W
You can refer to time 31:05 in the video above for a solution to a very similar example.
Please show your work below.
H
Normal
Enter your answer here
√x
E BIUS X₁ X²
22 Ix
Practice.
A JA
Answers
The function in f(t) form that describes the amount of fuel in the plane at time t will be:
f(t) = 112.25t + 31.425.75
What is the Equation of line?
The equation of the line in point-slope form passing through the points
(x₁ , y₁) and (x₂, y₂) with slope m is defined as;
⇒ y - y₁ = m (x - x₁)
Where, m = (y₂ - y₁) / (x₂ - x₁)
we have given that;
After 13 minutes, the airplane has 32,882 gallons of fuel. After 31 minutes, the airplane has 34,902.5 gallons of fuel.
Now,
Since, After 13 minutes, the airplane has 32,882 gallons of fuel. After 31 minutes, the airplane has 34,902.5 gallons of fuel.
Hence, The equation of line passes through the points (13, 32882) and (31, 34902.5)
So, We need to find the slope of the line.
Hence, Slope of the line is,
m = (y₂ - y₁) / (x₂ - x₁)
m = (32882 - 34902.5) / ((31 - 13)
m = 2020.5 / 18
m = 112.25
Thus, The equation of the line with slope 112.25 is,
⇒ y - 32885 = 112.25 (x - 13)
⇒ y - 32885 = 112.25x - 1459.25
⇒ y = 112.25x - 1459.25 + 32885
⇒ y = 112.25x + 31.425.75
Therefore, The function in f(t) form that describes the amount of fuel in the plane at time t will be:
f(t) = 112.25t + 31.425.75
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Write a related function for - 6x + x - 16= 3x
Answers
Answer:
x = -2
Step-by-step explanation:
hope this will help you
2x = 4.
-6x + x-16 = 3x
Collect like terms
-5x - 16 = 3x
-5x - 3x = 16
-8x = 16
Divide.
x = 16/-8
x=-2
Which additional piece of information would show that quadrilateral W X Y Z is a rhombus?
Answers
The additional fact that would prove that quadrilateral WXYZ is a parallelogram is '' XY = YZ''.
What is quadrilateral ?
A two-dimensional shape with four sides, four vertices, and four angles is referred to as a quadrilateral. Convex and concave are the two main forms. Convex quadrilaterals can also be divided into a number of subgroups, including trapezoids, parallelograms, rectangles, rhombus, and squares.
Properties include: There are four vertices . There are four sides . 360° is the total of all interior angles. There are two diagonals in them.
Trapezium is one of the five unique quadrilateral shapes. Parallelogram. Rectangle. Rhombus. Square
These bisectors intersect each other at 90 degrees.
And it means that they are perpendicular.
Since they are perpendicular, we find that there 4 congruent triangles, XY is parallel to WZ, and WX is parallel to YZ.
Additionally, opposite angles are equal.
These two latter findings are the characteristics of the parallelogram.
Hence, the additional fact that would prove that quadrilateral WXYZ is a parallelogram is '' XY = YZ''.
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Parts of a Right Triangle
In a right triangle, the sides that meet to form the
right angle are called the legs. The side opposite the
right angle is called the hypotenuse. The hypotenuse is
always the longest of the three sides. It is important
that you can correctly identify the sides of a right tri-
angle, regardless of what position the triangle is in.
leg
leg
60
1. Name the legs.
Practice
AABC is a right triangle.
TRIANGLES AND THE PYTH
hypotenuse
leg
leg
hypotenuse
hypotenuse
2. Name the hypotenuse.
leg
leg
APQR is a right triangle.
3. Name the legs.
4. Name the hypotenuse.
AHLM is a right triangle.
5. Name the legs.
6. Name the hypotenuse.
Review of Squares
and Square Roots
Before you study the Pythagorean theorem, le
first review squares and square roots. Just like add
tion and subtraction are inverses, so are squares
and square roots. In other words, they "undo" e
other. To square a number, you multiply it by itsel
For example, 52 means two factors of 5, or 5 times
5, which is 25. Written algebraically, it looks
this: 52= 5 x 5 = 25. A common mistake is to s
that you multiply by 2, since 2 is the exponent (the
small raised number). But the exponent tells you
how many times to multiply the base (bot
number) by itself.
Twenty-five is a perfect square. It can be writer
as the product of two equal factors. It would be he
Answers
1) The legs of △ABC are AB and BC.
2) The name of hypotenuse is AC.
3) The legs of △PQR are PR and RQ.
4) The name of hypotenuse is PQ.
5) The legs of △HLM are LH and ML.
6) The name of hypotenuse is MH.
What is a triangle?
A polygon with three edges and three vertices is called a triangle. It is one of the fundamental geometric shapes. Triangle ABC is the designation for a triangle with vertices A, B, and C. In Euclidean geometry, any three points that are not collinear produce a distinct triangle and a distinct plane.
The right angle of △ABC is ∠ABC. Thus AB and BC meet at right angle. Therefore AB and BC are legs of △ABC.
The opposite side of ∠ABC is AC. Therefore the hypotenuse is AC.
The right angle of △PQR is ∠PRQ. Thus PR and RQ meet at right angle. Therefore PR and RQ are legs of △PQR.
The opposite side of ∠PRQ is PQ. Therefore the hypotenuse is PQ.
The right angle of △HLM is ∠HLM. Thus HL and LM meet at right angle. Therefore HL and LM are legs of △HLM.
The opposite side of ∠HLM is MH. Therefore the hypotenuse is MH.
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Which of the following algebraic steps will solve the equation -6t = 2/3 and what is the solution?
Answers
Answer:
C. DIvide both sides by -6 to get 1/9.
Step-by-step explanation:
3. Write the recursive formula given the following sequence: 20, 15, 10, 5, ...
Answers
The recursive formula for the arithmetic succession will be written as aₙ = 25 - 5n.
What is an arithmetic sequence?A series of integers called an arithmetic succession or arithmetic chain of events has a fixed difference between the terms.
Let a₁ be the first term and d be a common difference.
Then the nth term of the arithmetic sequence is given as,
aₙ = a₁ + (n - 1)d
The sequence is given below.
20, 15, 10, 5, .....
The first term is 20 and the common difference is given as,
d = 15 - 20
d = - 5
Then the recursive formula given the following sequence is given as,
aₙ = a₁ + (n - 1)d
aₙ = 20 + (n - 1) × (-5)
aₙ = 20 - 5n + 5
aₙ = 25 - 5n
The formula for the arithmetic sequence will be written as aₙ = 25 - 5n.
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any help on this question
Answers
Using law of logarithm and exponent rules, the value of the unknown is 5
Logarithmlogarithms are the other way of writing the exponents. A logarithm of a number with a base is equal to another number. A logarithm is just the opposite function of exponentiation. For example, if 102 = 100 then log10 100 = 2.
Logₐ x = n or aⁿ = x
Where b is the base of the logarithmic function.
This can be read as “Logarithm of x to the base b is equal to n”.
In this case, we just need to solve for the value of b
4 = logₐ(625)
4 = 1 / log625(a)
multiply both sides by log₆₂₅(x)
log₆₂₅(a) / 4 = 1/4
applying log rules
a = 5
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Write the linear equation in slope-Intercept form that passes through the given points.
4. (1.3) and (-3,-5)
6. (-12, 14) and (6,-1)
5. (1, 4) and (6, -1)
Answers
Answer:
1.3,-12,16
Step-by-step explanation:
(7,5), (x, 2); m =
3
Answers
Answer: (6,2)
Step-by-step explanation:
(7,5) (x,2) m=3 x=?
y=mx+b
y=3x+b (1)
To find the coefficient b we take the coordinate that belongs to this line (7,5): x=7 y=5
5=3(7)+b
5=21+b
5-21=21+b-21
-16=b
Thus, b=-16
Hence, y=3x-16
To find the x we take the coordinate that belongs to this line (x,2): y=2
2=3x-16
2+16=3x-16+16
18=3x
Divide both parts of the equation by 3:
6=x
Thus, x=6
A lioness has 4 cubs that weigh 1.7 kg, 2.1 kg, 3 kg, and 2.7 kg. Each cub eats 1.25 kg of food a day. How much food will be needed to feed all the cubs for one year?
Answers
The quantity of food that would be needed to feed all the cubs for one year is 1825 kg
Calculating the quantity of food that would be needed to feed cubsFrom the question, we are to determine how much food would be needed to feed all the cubs for one year
From the given information,
"Each cub eats 1.25 kg of food a day"
Assume there are 365 days in a year.
Since there are 4 cubs,
The quantity of food that would feed the cubs for one year = 365 × 4 × 1.25
The quantity of food that would feed the cubs for one year = 1825 kg
Hence, the quantity of food needed is 1825 kg
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C
18. Andrew works at Grub Burger and earns
$8.00 an hour. Create a graph of the
relationship between x, the number of hours
and y, the total amount Andrew earns. Then
write an equation to represent the relationship.
EARNINGS ($)
50
45
40
30
25
20
15
10
5
1 2 3 4 5 6 7 8 9 10
HOURS
Answers
The graph of the relationship between x, the number of hours, and y, the total amount Andrew earns attached below, and the equation represent the relationship y = 8x.
What is the graph of the equation?
The graph of an equation is the group of all points on a number line or the coordinate plane that are solutions of an equation (= statement that two amounts are equal).
0 hours- $0
4 hours- $32
8 hours- $64
12 hours- $96
First find the equation of this problem to represent the relationship, which is y = 8x.
Next, you substitute the number of hours into x to get y, which is the amount of money.
Hence, the graph of the relationship between x, the number of hours, and y, the total amount Andrew earns attached below, and the equation represent the relationship y = 8x.
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In choosing what music to play at a charity fund raising event, Cory needs to have an equal number of piano sonatas from Haydn, Mozart, and Schubert. If he is setting up a schedule of the 15 piano sonatas to be played, and he has 52 Haydn, 18 Mozart, and 21 Schubert piano sonatas from which to choose, how many different schedules are possible? Express your answer in scientific notation rounding to the hundredths place.
Answers
Answer: Cory can have 6 different schedules
Step-by-step explanation:
Add them all together and divide by fifteen
The figures shown below are similar and the labeled sides are corresponding.
If the perimeter (P₂) of figure 2 is 25 ft then what is perimeter (P₂) of figure 1?
P1=feet
Answers
The Perimeter of the Pentagon in Figure 1 is 40ft
What is Pentagon?
A pentagon is a two-dimensional polygon having five sides and five angles. "Penta" means "five," and "gon" means "angles" in Greek, therefore when we mix the two words "penta + gon," we obtain the term "pentagon."
Solution:
Permieter of Pentagon = 5 * side
In Figure 1, the length of a side is 8 ft,
Then the Perimeter will be 8*5 = 40ft.
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Suppose you can afford to pay $ 325 a month for 9 years towards a new car with no down payment. If the current interest rates are 4.75%, how expensive a car can you afford?
Car sticker price =
Answers
Using the interest rates formula, we know that an automobile that costs $24588.44 is within our means.
What are interest rates?The amount of interest due each period expressed as a percentage of the amount lent, deposited, or borrowed is known as an interest rate.
The total interest on a loaned or borrowed sum is determined by the principal amount, the interest rate, the frequency of compounding, and the period of time the loan, deposit, or borrowing took place.
So, let's say the car's affordable price is P:
The entire payback is equal to P r/100 T + P.
In this case, P, r = 4.75, and T = 9 years.
$351,00 = P × (4.75/100 × 9 + 1)
$351,00 = P × ( 0.4275 + 1)
$351,00 = P × 1.4275
P = 351,00 / 1.4275
When you use the division operation, we receive:
P = $24588.44
Therefore, using the interest rates formula, we know that an automobile that costs $24588.44 is within our means.
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18.
Which of the following statements is true?
A. Angles are supplementary if and only
if they form a linear pair.
B. It is Valentine's Day if and only if it is
February.
C. A number is even if and only if it is
divisible by 2.
D. Lines are skew if and only if they are
non-coplanar.
Answers
Answer: The correct answer is D, Lines are skew if and only if they are non-coplanar.
In geometry, lines are said to be skew if they are non-coplanar, meaning they do not lie in the same plane. They also do not intersect.
Option A is incorrect because angles can be supplementary (add up to 180 degrees) even if they do not form a linear pair (meaning they do not share a common vertex and a common side).
Option B is incorrect because Valentine's Day does not always fall in February. It is February 14th, but it could fall on a different month in a different year.
Option C is correct because a number is even if and only if it is divisible by 2. An even number can be divided evenly by 2, while an odd number cannot.
How much money would i make a year if i work from6am to 2pm, from Saturday and sundays. And i get paid 13 an hour?
Answers
Assuming that you meant that you work Saturday and Sunday (2 days) and from 6-2pm (9 hours).
We know that there is 365 days in a year
Paid 13 dollars an hour for 9 hours.
——-The math——-
$117 - per day (9x13)
$234 - per 2 days (117 x 2) - it’s times two because that’s how many days you work
234 x 52 (u have times 52 because there is 52 Sundays and Saturdays in a year)
—— Yearly Salary ——-
$12168 - your answer
——-
Consider giving the answer brainiest, and have a good rest of your Day/Night/Evening
Which of the following choices is the area of the rectangle if the length is 8x and the width is 3y-2?
11xy-6x
24xy-16
24xy-16x
None of these choices are correct.
Answers
Answer:
Here,
the length=8x
the width =3y-2
We know that,
Area of rectangle=l×b
or, 8x × 3y-2
8x(3y-2)
24xy-16x
Hence, the correct answer is 24xy-16x
Given ΔPHS ≅ ΔCNF, find the values of x, y, and z.
Answers
In the given congruent triangle ΔPHS ≅ ΔCNF, the values of x, y, and z are 24° , 37/3° , 61/4° respectively
What is a congruent triangle ?
The meaning of congruent in Maths is addressed to those figures and shapes that can be repositioned or flipped to coincide with the other shapes. These shapes can be reflected to coincide with similar shapes.
Two shapes are congruent if they have the same shape and size. We can also say if two shapes are congruent, then the mirror image of one shape is the same as the other.
Two triangles are said to be congruent if their sides have the same length and angles have same measure. Thus, two triangles can be superimposed side to side and angle to angle.
In mathematics, the term "congruent" refers to figures and forms that may be flipped or rearranged to match up with other ones. These forms can be mirrored to produce related shapes. If two forms are similar in size and shape, they are congruent. We may also state that if two forms are congruent, then their mirror images are identical .Triangles that line up. A triangle is a closed polygon with three line segments that intersect at each of its three angles.
When the sides and angles of two triangles match, the triangles are said to be congruent. Thus, two triangles may be placed side by side and angle by angle on top of one another.
Since both the triangles are congruent this means the side , angles of both the triangles are equal
therefore,
∠ H = ∠ N
∠ S = ∠ C
∠ P = ∠ F
which means,
6x-29° = 115°
6x=144°
x=24°
∠ S = 180° - ∠ H - 36°
∠ S = 180°-6x+29°-36°
∠ S = 173°-6x
173°-6x=4z-32°
173°-144°+32° = 4z
61/4° = z
3y-1° = 36°
y= 37/3°
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1.) ΔECD ≅ ΔECX
CD=?
Answers
By the congruence property CD ≅ CX
Congruent examples include what?
Two figures are said to be "congruent" if they can be positioned perfectly over one another. Both of the bread slices are the same size and shape when stacked one on top of the other. Congruent refers to things that are exactly the same size and shape.
Which five types of congruence are there?
If two triangles meet all 5 requirements for congruence, then they are congruent. They are right angle-hypotenuse-side (RAHS), angle-side-angle (ASA), angle-angle-side (AAS), side-side-side (SSS), and side-angle-side (SSS) (RHS).
Given that:
ΔECD ≅ ΔECX
so ED ≅ EX
CD ≅ CX
by the congruence property
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