Twelve of the 30 students in the class are boys. what is the ratio of boys to girls in the class

Attached below

Step-by-step explanation:

Boys to girls

12 to 18 or 12:18

4 to 6 or 4:6

=

it should be a and d. lmk if i'm wrong xd

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!