I don’t get this please help me

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Which of the following could be the ratio of the length of the longer leg 30-60-90 triangle to the length of its hypotenuse? check all that apply. a. 313 6 b. 3: 215 c. 18: 13 d. 1: 13 e. 13: 2 of. 3: 15

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq