The number of girls int the choir is 4 times the number of boys in the choir. The total number of students in the choir is 60. How many girls are in the choir?

15 boys in the choir

Step-by-step explanation:

60/4

4 x 15 = 60

48

Step-by-step explanation:

First, make up some variables to represent the number of Girls and Boys in the choir.  

B = number of boys

G = number of girls

You know that there are 4 times as many girls in the choir as boys.  Therefore, the equation you can write is:

If you cross-multiply, then you get the simplified equation:

G = 4B

Intuitively this makes sense since if you multiplied the number of boys in the class by 4, that would be equal to the number of girls you have.

Now, we know that the total class size is 60. So girls plus boys equals 60:

G+B = 60

To solve the equation, replace the G in this equation with the replacement you found before, 4B.

G + B = 60 -->

4B + B = 60 -->

5B = 60 -->

B = 12

However, you are trying to find the number of girls, so plug the answer back into your equation.

G + B = 60 -->

G + 12 = 60 -->

G + 12 -12 = 60 - 12 -->

G = 48

The number of girls you have is 48.

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart