320 girls, 180 boys what percent are girls

Answers

Answer 1
Answer: if we have 320 girls and 180 boys so the total number is 320 + 180 = 500 so the percent of girls will be:
320/500 = ?/100 
so ? is your answer:
320 * 100 /500 = 64% :)))
i hope this is helpful
have a nice day 
Answer 2
Answer: First add them up to to find the total. 320+180=500. 320 out of 500 is 320/500, which is 0.64, which is 64%.

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Factor the expression. 4d + 12 Enter your answers in the boxes.

Answers

4d + 12 = 4(d + 3)
Basically, you just need to determine what 4d and 12 have in common.  In this case, they both divide evenly by 4. Therefore 4 (d + 3) = 4d + 12 according to the distributive property. 

(d + 3) = 4d + 12

Step-by-step explanation: none

A telephone company charges a fixed monthly rate plus a rate per minute of usage. The company charges $120 for 100 minutes of usage and $95 for 50 minutes of usage. An equation can be written to show the relationship between the total minutes used (x) and the total monthly charges (y). Which of the following best describes the steps to draw the graph of y against x? Draw a graph which joins the points (100, 120) and (50, 95) and has a slope = 0.50

Draw a graph which joins the points (100, 120) and (50, 95) and has a slope = 2

Draw a graph which joins the points (120, 100) and (95, 50) and has a slope = 2

Draw a graph which joins the points (120, 100) and (95, 50) and has a slope = 0.50

Answers

Answer

Draw a graph which joins the points (100, 120) and (50, 95) and has a slope = 0.50

Explanation

A graph of y against x means that x is the independent variable and y is the dependent variable. Notice that the charge (y) depends on the number of minutes (x). Therefore, the points that we are going to join to make our graph will have coordinates (x, y)

We know that the company charges $120 for 100 minutes, so x=100 and y=120. Therefore, our first point will be (100, 120)

We also know that the company charges $95 for 50 minutes, so x=95 and y=50. Therefore, our second point will be (50, 95)

Now, to find the slope between our tow points, we are going to use the slope formula:m=(y_(2)-y_(1))/(x_(2)-x_(1))

where

(x_(1),y_(1)) are the coordinates of the first point

(x_(2),y_(2)) are the coordinates of the second point

We know from our points that x_(1)=100, y_(1)=120, x_(2)=50, and y_(2)=95. So let's replace those values in our formula to find m

m=(y_(2)-y_(1))/(x_(2)-x_(1))

m=(95-120)/(50-100)

m=(-25)/(-50)

m=(1)/(2)

m=0.50

Now that we have our slope, we can use the point-slope formula to complete the equation of the line joining our two points

y-y_(1)=m(x-x_(1))

y-120=0.50(x-100)

y-120=0.50x-50

y=0.50x+70

Answer:

Draw a graph which joins the points (100, 120) and (50, 95) and has a slope = 0.50

Step-by-step explanation:

Find the point B on AC such that the ratio of AB to BC is 2:3

Answers

Answer:

B(4, - 3 )

Step-by-step explanation:

We have A(2, - 7) and C(7, 3 )

Using the section formula to calculate the coordinates of B

x_(B) = (3(2)+2(7))/(2+3) = (6+14)/(5) = (20)/(5) = 4

y_(B) = (3(-7)+2(3))/(2+3) = (-21+6)/(5) = (-15)/(5) = - 3

Hence B(4, - 3 )

Answer:

2 1/5, 1/5

Step-by-step explanation:

khan academy

Simplest form of 4/8

Answers

Since 4 is half of the number 8, the simplest form of that would be 1/2
~1/2 is the same as 4/8
1/2, 4 is half of 8 so it is 1/2

Swimming pool depth: Which is deeper? 1.4m 4ft

Answers

There are approximately 3.3 feet in a meter.

To find the number of feet, multiply 1.4 and 3.3

1.4 × 3.3 = 4.62

4.62 is greater than 4.
The swimming pool that is 1.4 meters deep is deeper.

Hope this helps!


Equivalent ratios 78:100 to 39:50

Answers

Well, they are equivalent, but I'm not sure if that's exactly what you're asking. :)