6, the formula is (b1+b2/2)*h
8+12/2=10
10*h=60 so h=6
If you mean that you want to solve the equation for v, then all you need to do is to multiply both sides by 3:

Answer:
24
Step-by-step explanation:
there are 6 seats and 3 boys, 3 girls.
First seat can be given to either boy or a girl.
So there are two ways.
If a boy is selected say, then he has to occupy 3rd and 5th only.
There are 2 ways
Now available positions are 2nd, 4th and 6th, in this girls can be arranged in 3! ways = 6
So total number of ways =

21,000 + 0.07(21,000) = 21,000 + 1,470 = 22,470
Answer:
Step-by-step explanation:
since you are learning about similar triangles... i'd guess that some where of the picture.. there is some words that say, that the two smaller triangles are the same, similar , congruent.. so that we can just add up angles 1 + 2 or
13 + 13 = 26 °