Answer:
21
Step-by-step explanation:
A ratio of 3:4 means that for every 3 boys there are 4 girls and vice versa.
12 girls / 4 girls = 3
3 boys * 3 = 9 boys
There are 9 boys in the class.
9 boys + 12 girls = 21 total students
Answer - u = 4.8989
u ^ 2 = 24
u = sqrt (24)
u = 4.8989
4u+3
Step-by-step explanation: 8/1*1/2= 8/2=4u
8/1*3/4= 24/8=3
135
Explanation:
Substitute 3 and 9 for a & b
5(3)(9)
= 135
See steps below
-3(2x+7)=-29-4x
Use the distributive property
-6x-21=-29-4x
Add 21 to each side
-6x=-8-4x
Add 4x to both sides
-2x=-8
Divide by -2
x=4
