The formula for a trapezoid is A= 1/2h(b1+b2) which equations are equivalent to the formula

h=2a/b1+b2

Step-by-step explanation:

A= 1/2h(b1+b2) To find out which of these are similar to this equation. To find this we must get what ever letter by itself.

h=2a/b1+b2

A= 1/2h(b1+b2)

2A=h(b1+b2)

2 A/(b1+b2)=1/2h

2A/(b1+b2)=h

This is correct

b1=2a/h-b2

b2= 2a/b1 -h

b2= 2a/h -b1

b1= 2a//b2-h

I hope that you do not mind that I do not solve the other problems because the first is correct. Hope this helps, if you need anymore help, let me know.

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐