The ratio of girls to boys in a gym class is 1 to 2 if there are 30 students in the class how many girls are in the class?

10 Girls

Step-by-step explanation:

This shows that there is twice as many boys in the gym class than girls.

Step 1:  Determine what the ratio relates to the amount

1:2 -> 10:20

10 Girls

20 Boys

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct