In class A, 15 out of the 30 students are girls, and in class B, 24 out of the 40 students are girls. Which class has a higher percentage of girls?​

Class B

Step-by-step explanation: 15 out of 30 is 50% and 24 out of 40 is 60% because 24 out of 40 is also the same as 12 out of 20. 20*5 = 100, so 12*5= 60. 60>50

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