5 The ratio of boys to girls in a class is 3:1. There are 36 students in the class. How many
students are girls?

 9 girls

Work Shown:

B = number of boys

G = number of girls

Ratio of boys to girls is 3:1, so B/G = 3/1 which solves to B = 3G

We have 36 total students, meaning that,

B+G = 36

3G+G = 36 ... replace B with 3G

4G = 36

G = 36/4

G = 9

There are 9 girls in the class

B = 3G

B = 3*9

B = 27

and there are 27 boys leading to a total of B+G = 27+9 = 36, which helps confirm the answer.

Note how the ratio 27:9 reduces to 3:1 when we divide both parts by 3.

I’m going to infer you said parallel.solve for yy= -1/2x+7/4lines that are parallel have the same slope, different y intercept.so we know m is -1/2then from there solve for y intercept.

We need more info then that