# Expressions Represented with Graphs

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A building block has the dimensions height Xcm, width (3+X) cm, depth Xcm

What espression, in terms of x, would represent the total surface area (A) of the block? Put the expression into the simplest terms.

Draw a graph, estimate a value for x, which will give a surface area of 175.5 cm squared.

Check your extimate of x by solving the equation when A = 175.5

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#### Solution Preview

There are six sides to the block,

two sides have the area = depth * width (Note: "*" means multiply)

two sides ...

#### Solution Summary

The expressions represented with graphs are provided. The total surface of the block is found.

$2.49