Answer:
a. the time spent answering homework
b. time finished and time started
c. subtraction
d. 7:20-6:50 (unsure how this is supposed to be laid out)
e. Carlo spent 30 minutes answering his homework
Which of the following is equivalent to the expression below?
√16x^3
8x 2/3
4x 3/2
8x 3/2
4x 2/3
V
Write 8.4% as a fraction in simplest form.
Answer:
21/250
Step-by-step explanation:
Converting percentage to fraction :
Divide by 100%8.4%/100%8.4/100Multiply both sides by 10 to remove the decimal8.4 x 10 / 100 x 1084/1000Divide both sides by 4(84/4)/(1000/4)21/2504/8 plus 2/4 find the common denomnator
Answer:
The common denominator is 4.
Step-by-step explanation:
4/8 simplified is 2/4.
Therefore, we can now add them together.
2/4 + 2/4 = 1.
Hope this helps:) Goodluck!
Right triangles and trigonometry
Answer:
x = 13.83
Step-by-step explanation:
[tex]sin(70^{o}) =\frac{13}{x}[/tex]
[tex]x=\frac{13}{sin(70^{o} )} =13.83[/tex]
Hope this helps
8. There are 12 people that have entered a gaming tournament with prizes for 1st place, 2nd place, and 3rd place. How many combinations of winners can there be?
220
1320
1728
360
Answer:
1728
Step-by-step explanation:
When there is 3 places you have to sqaure 12 by 3
12^2= 144
144*12= 1728
Hope this helps.
a number 1-72 is chosen at random find each probability
P( multiple of 9)
The selection of a random number from 1 - 72 is an illustration of probability, and the probability of selecting a multiple of 9 is 1/8
How to determine the probability?The sample size is given as:
n = 72
There are 8 multiples of 9 from 1 to 72.
So, the probability that a multiple of 9 is selected is:
P(Multiple of 9) = 8/72
Simplify
P(Multiple of 9) = 1/9
Hence, the probability of selecting a multiple of 9 is 1/8
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Help me answer this question :((((
Answer:
97.5
Step-by-step explanation:
75,85,90,105,120,150
90 and 105 are the middle, and median means the middle, but you can only have one answer.
90+105=195
195÷2=97.5
97.5 is the middle of all these numbers
PLEASE HELP IM SO CONFUSED
Answer:
Lake Carters, Lake Amistad, Lake Alamo
Step-by-step explanation:
Starting with lake Alamo:
current level: 1,080
Full pool: -48.5
This indicates that the level is currently 48.5 feet below a full pool
Therefore, the level of it as a full pool is 1,080 + 48.5, or 1,128.5 feet
Lake Amistad:
Current Level: 1,038
Full pool: -7.1%
This indicates that the level is currently 7.1% below a full pool
subtract 7.1% from 100%
100-7.1=92.9
Percent formula:
P% * X = Y
P = 92.9
Y = 1038
X = 1038 / 92.9%
X = 1117.33
Full pool = 1117.33
Lake Carters
Current level: 1078
Full pool: + 60/13
This indicates that the level is currently 60/13 above a full pool
60/13 = 4.62
1078 - 4.62 = 1073.38
full pool = 1073.38
So, the order is Lake Carters, Lake Amistad, Lake Alamo
Please help me do this :)))))))
Answer:
x=6
Step-by-step explanation:
BC=7
x+1=7
x=7-1=6
x=6
Triangle
RST is graphed on a coordinate plane with vertices
R(-2, -2),
S(5,-1), and
T(-1,-4). Which of the following methods would
prove that triangle
RST is a right triangle? Select ALL that apply.
A. Applying the slope formula on each of the sides and showing that two of the slopes are negative reciprocals.
B. Applying the distance formula on each of the sides and showing that the three lengths satisfy the converse of the Pythagorean Theorem.
C. Applying the midpoint formula on two of the sides and showing that the segment with the two midpoints as endpoints is half the length of the third side.
Answer:
A. and B.
Step-by-step explanation:
Consider the differential equation (x - 1)y" + y' = 0. By using power series so- lution about the ordinary point 0 we obtain: c_{k+1)=[(k+1)/(k+2)] C_(K); k=1,2,3.... c_(K+2)=[(k+1)/(k+2)] C_(K+1); k=0,1,2,3... None of them c_(k+2)=[(k+1)/(k+2)] C_(k+1); k=1,2,3....
Given the ODE
(x - 1) y'' + y' = 0
we assume a solution of the form
[tex]y(x) = \displaystyle \sum_{n=0}^\infty c_n x^n[/tex]
with derivatives
[tex]y'(x) = \displaystyle \sum_{n=0}^\infty n c_n x^{n-1} = \sum_{n=0}^\infty (n+1) c_{n+1} x^n[/tex]
[tex]y''(x) = \displaystyle \sum_{n=0}^\infty (n+1) n c_{n+1} x^{n-1} = \sum_{n=0}^\infty (n+2)(n+1) c_{n+2} x^n[/tex]
Substituting these series into ODE gives
[tex]\displaystyle (x - 1) \sum_{n=0}^\infty (n+2)(n+1) c_{n+2} x^n + \sum_{n=0}^\infty (n+1) c_{n+1} x^n = 0[/tex]
[tex]\displaystyle \sum_{n=0}^\infty (n+2)(n+1) c_{n+2} x^{n+1} - \sum_{n=0}^\infty (n+2)(n+1) c_{n+2} x^n + \sum_{n=0}^\infty (n+1) c_{n+1} x^n = 0[/tex]
[tex]\displaystyle \sum_{n=1}^\infty (n+1)n c_{n+1} x^n - \sum_{n=0}^\infty (n+2)(n+1) c_{n+2} x^n + \sum_{n=0}^\infty (n+1) c_{n+1} x^n = 0[/tex]
[tex]\displaystyle \sum_{n=1}^\infty \bigg((n+1)n c_{n+1} - (n+2)(n+1) c_{n+2} + (n+1) c_{n+1}\bigg) x^n - 2c_2 + c_1 = 0[/tex]
[tex]\displaystyle \sum_{n=1}^\infty \bigg((n+1)^2 c_{n+1} - (n+2)(n+1) c_{n+2}\bigg) x^n - 2c_2 + c_1 = 0[/tex]
[tex]\displaystyle \sum_{n=0}^\infty \bigg((n+1)^2 c_{n+1} - (n+2)(n+1) c_{n+2}\bigg) x^n = 0[/tex]
Then the coefficients [tex]c_n[/tex] are given recursively by
[tex](n+1)^2 c_{n+1} - (n+2)(n+1) c_{n+2} = 0[/tex]
for all n ≥ 0, or equivalently,
[tex]c_{n+2} = \dfrac{n+1}{n+2} c_{n+1}[/tex]
which most closely resembles the second choice.
The first aircraft has 59 more seats than the second aircraft. The third aircraft has 42 fewer seats than the second aircraft. If their total number of seats is 407, find the number of seats for each air craft.
Answer:
first aircraft=189
second aircraft=130
third aircraft=88
Step-by-step explanation:
1st = x+59
2nd = x
3rd= x-42
x + 59 + x + x - 42 = 407
3x + 59- 42 = 407
3x + 17 = 407
3x = 407 - 17
x=390÷3
=130
1st=130+59=189
2nd=130
3rd=130-42=88
Simplify.
2
5x² - 7x + 3
-
10
+ 8x² + 9x
I need help
Answer:
621 i guess
Step-by-step explanation:
18x² + 2x² - 7
Tap on a clip to paste it in the text box.
Question 3 (2 points)
Suppose that the mean cost of a haircut for a man is $28 and the mean cost of a
haircut for a woman is $44.
Which statement is true about the cost of haircuts?
The statement that is true about the cost of haircuts is "On Average, the cost of a man's haircut is $16 less than the cost of a women's haircut".
What is Mean?A mean is an arithmetic average of a set of observations. it is given by the formula,
Mean = (Sum of observations)/Number of observations
Given that the mean cost of a haircut for a man is $28 and the mean cost of a haircut for a woman is $44. Therefore, the statement that is true about the cost of haircuts is "On Average, the cost of a man's haircut is $16 less than the cost of a women's haircut".
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Write 7.03 x 10-3 as an ordinary number
Answer: 0.00703
Step-by-step explanation: The ordinary number, or standard form, of this expression would be 0.00703 because here, we are multiplying 7.03 in scientific notation by a power of ten that is negative. If any exponential power of 10 is being multiplied and is negative, the digits move that same number of places to the right of the decimal point to render a smaller number than it was in the expression. Hope this helps!
Gustavo is in a contest where he will win one of four possible prizes. He creates a four-part spinner to represent the four prizes that he has an equal chance of winning: a video game system, a bicycle, a watch, and a gift card. He spins the spinner several times to demonstrate the likelihood of winning a certain prize.
What is true about Gustavo’s method of data collection and his data on the possible prizes?
Gustavo used an experiment where the data is qualitative.
Gustavo used an experiment where the data is quantitative.
Gustavo used a simulation where the data is qualitative.
Gustavo used a simulation where the data is quantitative.
The correct option about Gustavo’s method of data collection and his data is Gustavo used a simulation where the data is qualitative.
What is qualitative data?Qualitative data is data that describes the properties that a certain object or event possesses. The numerical value assigned to qualitative data do not have an significance. A simulation is a form of test run for an actual event.
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Answer:
ITS C
Step-by-step explanation:
Please tell me what the value of x is
Part A: The length of two sides of a triangle are:
Side 1:
Side 2:
The perimeter of the triangle is
Part A: What is the total length of the two sides, 1 and 2, of the triangle? Show your work. (7 points)
Part B: What is the length of the third side of the triangle? Show your work. (7 points)
Part A: The total length of the two sides, 1 and 2, of the triangle is 10x² + 14x - 8
Part B: The length of the third side of the triangle is 10x³ -2x² - 16x + 2
Calculating the sides of a triangleFrom the given information,
The length of side 1 is
6x² - 4x - 2
and the length of side 2 is
18x + 4x² - 6
Part A
The total length of the two sides, 1 and 2, of the triangle will be
Length of side 1 + Length of side 2
That is,
6x² - 4x - 2 + 18x + 4x² - 6
This becomes,
6x² + 4x² + 18x - 4x - 2 - 6
10x² + 14x - 8
Therefore, the total length of the two sides, 1 and 2, of the triangle is 10x² + 14x - 8
Part B
The length of the third side will be
Perimeter of the triangle - the total length of sides 1 and 2
From the given information,
The perimeter of the triangle is 10x³ + 8x² - 2x - 6
Then,
Length of third side = 10x³ + 8x² - 2x - 6 - (10x² + 14x - 8)
Length of third side = 10x³ + 8x² - 2x - 6 - 10x² - 14x + 8
Length of third side = 10x³ + 8x² - 10x² - 2x - 14x - 6 + 8
Length of third side = 10x³ -2x² - 16x + 2
Hence, the length of the third side of the triangle is 10x³ -2x² - 16x + 2
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caculate the area of this triangle
Answer: 99 cm²
Step-by-step explanation:
The area of a triangle can be found with [tex]a=\frac{b*h}{2}[/tex] so we will plug in the given values and solve.
[tex]\displaystyle a=\frac{b*h}{2}[/tex]
[tex]\displaystyle a=\frac{(18 cm)(11cm)}{2}[/tex]
[tex]\displaystyle a=\frac{198\;cm^2}{2}[/tex]
[tex]\displaystyle a= 99\;cm^2[/tex]
in a certain triangle angle c is 40 degrees more than the sum of the measure of angle a and angle b. the measure of angle a is 20 degrees less than the measure of angle b. find the measure of each angle
Step-by-step explanation:
the sum of all angles in a triangle is always 180°.
angle c = angle a + angle b + 40
angle a = angle b - 20
angle a + angle b + angle c = 180
using the second equation in the first :
angle c = (angle b - 20) + angle b + 40 = 2×angle b + 20
using this and the second equation in the third equation :
(angle b - 20) + angle b + (2×angle b + 20) = 180
4×angle b = 180
angle b = 45°
angle a = angle b - 20 = 45 - 20 = 25°
angle c = angle a + angle b + 40 = 25 + 45 + 40 = 110°
Simplify the following expression:
4 + √-4 + √-9 + 7
A. 11 + 5i
B. 5 - 11i
C. 11 + √13i
D. 15 + 0i
How much water should be added to 22 ml of 12% alcohol solution to reduce the concentration to 11%
The amount of water that is needed to be added to the 12% concentration solution to make it 11% concentrated is 2 ml.
What are Percentages?A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.
To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.
Given that the alcohol solution of 22 ml has a 12% of concentration. Therefore, the amount of alcohol in the solution is,
12% of 22ml = 2.64ml
Since the amount of alcohol should be the same while the concentration should be diluted, therefore, the amount of alcohol in the final solution can be written as,
[tex]11\%\ of\ x = 2.64{\rm\ ml}\\\\\dfrac{11}{100} \times x = 2.64\\\\x = 24\rm\ ml[/tex]
As the total solution with 12% concentration was 22 ml, while the total solution with 11% concentration was 24 ml.
Hence, the amount of water that is needed to be added to the 12% concentration solution to make it 11% concentrated is 2 ml.
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Tom, Lily, and Shelby, competed as a team in a scavenger hunt. They were given a list of items to find around their neighborhood. Together the three of them found every item on the list. Tom found 1/3 of the items, and Lily found 4/9 of the items. Which area model represents the fraction of the item on the list that Shelby found?
The f(x) represents the fraction of the items on the list that Shelby found if Tom found 1/3 of the items, and Lily found 4/9 of the items.
What is a fraction?A fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
Let's suppose the Total items in the list is x and Shelby found f(x) item.
Tom found 1/3 of the items, and
Lily found 4/9 of the items.
Then,
[tex]\rm f(x) = x - (\dfrac{1}{3}+ \dfrac{4}{9})\\\\\rm f(x) = x - (\dfrac{3+4}{9})\\\\\rm f(x) = x - \dfrac{7}{9}\\\\\\\rm f(x) = \dfrac{9x-7}{9}\\\\[/tex]
Thus, the f(x) represents the fraction of the items on the list that Shelby found if Tom found 1/3 of the items, and Lily found 4/9 of the items.
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PLEASE HELP AND FAST
This is a picture of a cube and the net for the cube.
What is the surface area of the cube?
48 mm²
64 mm²
112 mm²
384 mm²
Answer:
The answer is D
Step-by-step explanation:
The solution is in the file
I need help in 17 & 18 & 19 :(
Answer:
The perimeter of the rectangle is 28 units
Victoria was given the expression 5x - 4x^2 - 1 + x - 8x^2 + 7 and asked to simplify it. How can she simplify the expression?
A. -12x^2 + 6x + 6
B. 13x^2 - 5x + 6
C. -4x^2 + 6x + 8
D. 4x^2 + 4x + 8
Answer:
the answer is C I hope this helps
The expression after simplifying is -12x² + 6x + 6.
Option A is the correct answer.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
5x - 4x² - 1 + x - 8x² + 7
Add like terms.
6x - 12x² + 6
-12x² + 6x + 6
Thus,
The final expression is -12x² + 6x + 6.
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A pool is leaking at a rate of a quarter of a gallon per minute. What is this rate in gallons per hour?
Answer:
15 gallons per hour
Step-by-step explanation:
So, what is given in the equation is that 1/4 of a gallon is leaking per minute. We have to change this to gallons per hour. Set it up like this:
[tex]\frac{\frac{1}{4}gallon }{1 minute} *\frac{60 min}{1 hour}[/tex]
Use a calculator and multiply 1/4 by 60.
After doing this, you should get:
[tex]\frac{15 gallons}{1 hour}[/tex]
Thus, the answer is the pool will leak 15 gallons per hour.
Hope this helps!! Ask questions in comments if needed!
sixty students were surveyed at random about their favorite music genre. Out of population 1,000 students, how many how many will prefer pop music?
So we want to know how many out of 1000 people did not listen to any type of the three music types that were surveyed If 30% of people listened to pop, 26% of people listened to rock and 20% of people listened country music. So first lets see how many people liked the three types of music: 30%+26%+20%=76%. So 24% of people did not like the three types of music that were surveyed. Finally we need to see how many people in 1000 is 24%. 24% out of 1000 people is 0.24*1000=240 people. So 240 people didn't like the 3 types of music.
find the equation of the circle with centre (2,3) and which touches the x-axis
Answer:
(y-3)^2=4p(x-2)
Step-by-step explanation:
C(h,k)
The equation is (y-k)^2=4p(x-h)
Answer:
(x-2)² + (y-3)² = 9
Explanation:
Circle Formula: (x - h)² + (y - k)² = r²
As touches x axis, coordinates: (2, 0)
radius: √(2-2)² + (3 -0)² = 3
Now find equation:
= (x-2)² + (y-3)² = 3²
= (x-2)² + (y-3)² = 9
230 is 12% of what number? Use proportion to find the answer.
Answer:
hello!!!
the answer is 1916.6
please read the explanation it always helps... trust me!
Step-by-step explanation:
alrighty so....
we what to find the number that when we take 12% of we get 230...
okay we have to switch things up in the percent formula since we dont have the total number just the percentage and the percent number itself (i hope that isnt confusing.. the math is easier tho)
230 x 100= 23000 --> 23000/12= 1,916.6
Answer:
1,916.67
Step-by-step explanation:
1230/12 = x/100.
12x= (230)(100).
12x=23000.
x= 23000/100
x = 1,916.67