a. h=5 b. A=.5(b)(h). So, 18=.5(6)(h+1). If I plug in 5 as h and solve, 18=.5(6)(6) which can be simplified to 18=(.5)(36). So, h is 5.
Step-by-step explanation:
Since the area = 18, and the formula for area is .5(b)(h), I can start solving by plugging in the numbers I have. 18=.5(6)(h+1). I multiply both sides by 2 to get rid of the .5, getting 36=6(h+1). I divide by 6 on both sides, getting 6=h+1. I subract 1 on both sides to get h=5