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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

4. Solving Absolute Value Equations

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Exercise 64 Page 34

Use the formula for the area of a square.

9 meters

Practice makes perfect

We have been given the area of a square and need to solve for the side length.

In order to do this, let's first recall the formula for the area of a square. A=s^2 In the formula s is the length of one side. We know that the square has an area of 81m^2. We will substitute 81 for A in the formula and then solve for s.

A=s^2

A= 81

81=s^2

▼

Solve for s

Rearrange equation

s^2=81

sqrt(LHS)=sqrt(RHS)

s=sqrt(81)

Calculate root

s=9

The side length is 9 meters.

Subchapter links

Communicate Your Answer p.27

Monitoring Progress p.28-31

Exercises p.32-34