Chapter A.2, Problem 34E

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Chapter
Section

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

# In Exercises 33 to 36, find the value of the indicated variable for each given formula. b ,  if  A = 1 2 ⋅ h ⋅ ( b + B ) ,   A = 156 , h = 12 ,  and  B = 11

To determine

To find:

The value of the indicated variable b for the given formula.

Explanation

Concept for evaluating the expression:

1) In an algebraic expression, letters can stand for numbers.

2) Substitute a specific value for each variable.

3) Then perform the operations.

Calculation:

Given:

Formula: A=12â‹…hâ‹…(b+B)

Substitute A=156,h=12,Â andÂ B=11 in the given formula, we get

A=12â‹…hâ‹…(b+B)156=12â‹…12â‹…(b+11)156=6â‹…

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