SOLUTION: I am trying to figure out (h) in the following problem. A=1/2h(B+b) where as A=80, B=12, and b=8. I have tried it and come up with h=80 but when i plug the number back in it does n

Question 158181: I am trying to figure out (h) in the following problem. A=1/2h(B+b) where as A=80, B=12, and b=8. I have tried it and come up with h=80 but when i plug the number back in it does not balance out. Please help
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Plug in A=80, B=12, and b=8

Add

Rearrange the terms.

Multiply

Reduce

Divide both sides by 20 to isolate h.

Reduce

So the answer is which means that the height is 8 units.

Check:

Start with the given equation.

Plug in A=80, h=8, B=12, and b=8

Add

Multiply

Reduce. Since the equation is true, this means that we've verified the solution.
RELATED QUESTIONS
I have been struggling with this problem for a few days now: Let U = {1, 2, 3, 4,... (answered by MathLover1,helper 1234321,ikleyn,MathTherapy)

The following equation can be used to find the area of a trapezoid. Solve for the... (answered by jim_thompson5910)

The following equation can be used to find the area of a trapezoid. Solve for the... (answered by stanbon)

You have two cans of paint. Can A contains 80% red paint and 20% blue paint. Can B... (answered by josmiceli)

I have tried many different ways, but i cannot figure out the answer, i have even asked... (answered by jim_thompson5910,KMST,scott8148)

Jennifer has $5000 to invest into two accounts paying simple interest. The first account... (answered by macston)

I am trying to figure out a "word" problem. It goes, Let W be all the words in English. (answered by stanbon)

I am trying to figure out the following problem to say what is 'b': 1/a + 2/b = 3/c... (answered by askmemath)

I am having a hard time with multiplying out (2+h)^3. I have tried to do... (answered by richard1234,MathLover1)