IF YOU KNOW HOW TO DO THIS HELP PLEASE!

Step-by-step explanation:

A = base *h /2

A = (4*15/2 )/2  = 15 in²

A = (1 and 3/7 *14/5 )/2  = (10/7 * 14/5 )/2 = 2 in²

A= (5 and 2/7 * 7/2) /2 = (37/7 * 7/2)/2 = 9.25 in²

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.