the ratio of number of girls and boys in a class is 4:3 if there are 20 girls find the number of boys. plz do it in process
Answer:
15 boys
Step-by-step explanation:
Whatever number one side of the ratio is multiplied by, the other side has to be multiplied by that same number. So, we have to find the number that 4 is multiplied by to get 20. We can represent this as an equation, where the unknown number is x:
4x = 20
Divide both sides of the equation by 4 to find the value of x:
x = 5
4 was multiplied by 5 to get 20.
To find the number of boys, multiply 3 by 5:
3 * 5 = 15
If there are 20 girls, there will be 15 boys.
can someone please help mee.
Answer:
[tex]\displaystyle y<-\frac{1}{5}x+1[/tex]
Step-by-step explanation:
Graph of an inequality
The graph represented in the image is a line and we have two clear points through which the line passes.
Those points are (0,1) and (5,0).
The equation of a line can have the slope-intercept form:
y=mx+b
Substituting the point (0,1):
1=0+b
b=1
Substituting the point (5,0):
0=m(5)+1
Solving for m:
[tex]\displaystyle m=-\frac{1}{5}[/tex]
The equation of the line is:
[tex]\displaystyle y=-\frac{1}{5}x+1[/tex]
The origin belongs to the solution if we substitute (0,0) the inequality should stand:
0<1
Or:
0≤1
Since the line is dashed, the boundary line is not part of the solution
Thus the inequality is:
[tex]\boxed{\displaystyle y<-\frac{1}{5}x+1}[/tex]
Option D.
Determine If The Triangles Are Similar.If They Are,Choose The Reason Why.
Answer:
because they all have 3 corners
4s - 13 = 51 SHOW ALL WORK
Answer:
you have to get rid of the numbers and then get rid of the letters until only s is left
Step-by-step explanation:
4s - 13= 51
51+13= 64
4s= 64
64÷4 = 16
s= 16
SOMEONE HELP!! ASAP ! I’ll give brainliest !!!
I need answers for A B and C! Pls and ty!!
i really need help with this fast!!
Answer:
Hello. y=1/2x-2
Step-by-step explanation:
The line that is perpendicular to this line ،its slope must be 1/2
So:
[tex]y - y0 = m(x - x0) \\ y - 2 = \frac{1}{2} (x - 8) \\ y = \frac{1}{2} x - 2[/tex]
6. Which set of ordered pairs represents y as a function of X?
which number is irrational number √79 0r √100000
Please help!!! I need help!
Answer:
sorry dont know the answer
Step-by-step explanation:
what is the x and y intercept if a line on a graph if it has the equation 2x-3y=7? please answer this...
Find the value of the integral from 2 to 6 of the natural log of x, dx using four rectangles of equal width, with each right end-point used to find the height of each rectangle.
Answer: Choice B.
ln(3) + ln(4) + ln(5) + ln(6)
=======================================================
Explanation:
Refer to the diagram below. It shows four rectangles each of base 1. Their height varies depending on the output of the natural log function.
More specifically the heights are ln(3), ln(4), ln(5) and ln(6) from left to right. Note how this corresponds exactly to the points on the y = ln(x) curve such that they are the upper right corners of the Riemann Sum rectangles. These corner points are points A,B,C,D.
Since each base is 1 unit wide, this means each rectangle's area is equal to the height. More thoroughly, we say that
area = base*height = 1*f(x) = f(x), where x takes on the values from {3,4,5,6}
Side note: As the diagram shows, we have an overestimate of the actual area under the curve from x = 2 to x = 5.
Which statement is true? 1, A strong association implies a positive correlation. 2, A Positive correlation implies a strong association. 3, A positive correlation implies a positive slope. 4, A negative correlation implies a weak association Intro
Answer:
it's A
Step-by-step explanation:
is a positive correlation
For each representation of a relationship, determine if it is a function or not.
Explain how you know with your answer.
(Giving brainliest to first and correct answer)
Answer:
e is a function; f is not a function
Step-by-step explanation:
All functions must pass the vertical line test. this means that the when those points are plotted, no two points are on the same vertical line. You can tell if they are on the same vertical line by their x-coordinate. If two points have the same x-coordinate, then they are on the same vertical line. This means that the if two points have the same x-coordinate in the relationship, it is not a function. In e, the x-coordinates are 0, 4, 8, and 3. In f, the x-coordinates are 0, 4, 0, and 6. In e, all the x-coordinates are different, so it is a function. In f, however, 0 is a repeated x-coordinate, so it is not a function.
Find the 35th term of the arithmetic sequence -2, -4, -6, -8, ...
Answer:
[tex]a1 = - 2 \\ d = - 4 - - 2 = - 4 + 2 = - 2 \\ a35 = a1 + 34d \\ a35 = - 2 + 34 \times - 2 \\ a35= - 2 + - 68 \\ a35 = - 70 \\ thank \: you[/tex]
What is an equation in point-slope form of the line that passes through (-7. 1) and (-3, 9)?
A. y+ 3 = 2(x-9)
B. y-3 = 2(x +9)
C. y + 9 = 2(x - 3)
D. y - 9 = 2(x + 3)
Answer:
D
Step-by-step explanation:
general equation of point slope is
(y-y1)=m(x-x1) where
m-is the slope
(x1,x2) is any point that belongs to the line
For (-7,1) and (-3, 9) you have to
first find the slope
m= (y2-y1) /(x2-x1) = (9-1)/ (-3- -7)= 8/(-3+7) = 8/4 =2
second pick any of your 2 given points for example (-3, 9)
now you substitute m=2, and (-3,9) in your general equation
(y-9) = 2( x- -3) so the equation is (x-9) =2(x+3)
can you help me with this? 1
Answer:
I think the correct answer is A
Step-by-step explanation:
becoz an isosceles triangle has both angles equal and also the hypotenuse is the same
What is the decimal equivalent of 11/50
please help, i need this answer by sunday .........
14. f(x)=2x+1
If f(x)=4 what is the value of x ?
15 . Give the domain and range . Tell if it’s a function
Answer:
c
Step-by-step explanation:
Jaimie earned $80 this week coaching basketball, which is twelve dollars more than twice what she made last week. How much money did Jaimie make last week?
Please Help!!!!
Answer:
34
Step-by-step explanation:
$80 - 12 is 68, and 68/2 is 34.
Hope this is right and helps!
A builder is building a rectangular deck with dimensions of 16 feet by
30 feet. To ensure that the sides form 90° angles, what should each
diagonal measure?
Answer:
Each diagonal should measure 34 feet to ensure that the sides form 90°
Step-by-step explanation:
The relation between the diagonal of the rectangle and its length and width is D = [tex]\sqrt{L^{2}+W^{2}}[/tex] ⇒ Pythagoras Theorem
∵ A builder is building a rectangular deck with dimensions of 16 feet
by 30 feet
∴ L = 16 feet
∴ W = 30 feet
→ By using the Pythagoras Theorem above to find its diagonal
∵ D = [tex]\sqrt{(16)^{2}+(30)^{2}}[/tex]
∴ D = [tex]\sqrt{256+900}[/tex]
∴ D = [tex]\sqrt{1156}[/tex]
∴ D = 34 feet
→ The diagonals of the rectangle are equal
∴ The length of each diagonal of the rectangle = 34 feet
Each diagonal should measure 34 feet to ensure that the sides form 90°
Given that n=N-ab find the value of N when n=6,a=1 and b=2
Answer:
N = 8Step-by-step explanation:
n=N-ab
where n = 6
a = 1
b = 2
6 = N - 1(2)
N = 6 + 2
N = 8
find the slope pleaseee
Answer:
[tex]m=\frac{4}{5}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDASAlgebra I
Slope Formula: [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Step-by-step explanation:
Step 1: Define
Pick any 2 points from the chart.
Point (-5, -7)
Point (0, -3)
Step 2: Find slope m
Substitute: [tex]m=\frac{-3+7}{0+5}[/tex]Add: [tex]m=\frac{4}{5}[/tex]Divide 3983 /4 give quotient and remainder
Answer:
quotient = 995
remainder = 3
Step-by-step explanation:
HELP I GOTTA TURN THIS IN QUICK!
Answer:
25 degrees
Step-by-step explanation:
angle ABC is supplementary to angle CBD
you'd do x + 155 = 180, x being the measure of angle ABC
it isn't 77.5 since 77.5+155 is not 180
Find the slope of the line through each pair of points.
(0, -15), (3,-6)
m =
Which two points on the number line are opposites?
B
D
O points A and B
points B and C
O points C and D
O points A and D
Answer:
The answer is B, points B and C
om each drop-down menu. Megan's commute to work includes an 8-mile drive and a 21-mile train ride. This expression can be used to find the total time it takes Megan to get to work, where xis her average driving speed in miles/hour. 21
Answer: The answers are x+20 and 0.50 hrs
I just took the test so ik these are right
The total time it takes Megan to get to work,
⇒ (8 / x) + (21 / y)
where, x is her average driving speed in miles/hour. 2
What is Division method?Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10
Given that:
Average driving speed = x mph
Miles driven to work = 8 mile
Miles by train to work = 21 miles
Average train speed = y
Hence, Total time taken to get to work is,
We know that;
⇒ Time taken = distance / speed
Hence,
⇒ Time taken = total distance / average driving speed
⇒ Total time taken = (8 / x) + (21 / y) hours
⇒ Total time taken = (8 / x) + (21 / y) hours
Learn more about the divide visit:
brainly.com/question/28119824
#SPJ5
Place the numbers 1.07, 1.7 and 1.007 in order from greatest to least.
Answer:
1.007, 1.07, 1.7
Step-by-step explanation:
Answer:
1.7, 1.07, 1.007
Step-by-step explanation:
A tenth is greater than a hundredth or a thousandth. A hundredth is greater than a thousandth, and a thousandth is less than both a hundredth and tenth
The graph shows the distance Arlene ran on Saturday preparing for a marathon. What is the rate of change and what does it represent?
Answer:
Rate of change = 6 miles per hour
Step-by-step explanation:
Rate of change of the line is represented by the slope of the line.
Formula to get the rate of change is,
m = [tex]\frac{\triangle y}{\triangle x}[/tex]
From the graph attached,
Given straight line is passing through two points (2, 12) and (4, 24).
Rate of change = [tex]\frac{y_2-y_2}{x_2-x_1}[/tex]
= [tex]\frac{24-12}{4-2}[/tex]
= 6
Rate of change of the line = 6 miles per hour
Therefore, rate of change of the graph will define the speed of Arlene.