An Artist Intends to Paint a 84-Square-Foot Mural on a Wall

question 23

Multiple Choice

An artist intends to paint a 84-square-foot mural on a wall that is 18 feet long and 10 feet high. If the artist wants to leave a border of uniform width, how wide should the border be? ( Hint: Let $w$ represent the width of the border. Then $18 - 2 w$ represents the length of the mural.)

• A) 1 foot
• B) 6 foot
• C) 2 foot
• D) 14 foot
• E) 13 foot

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Definitions:

Vertex

The highest or lowest point of a parabola where it changes direction, or a corner point of a geometric shape.

Focus

In geometry and optics, the point where rays or waves meet or from which they diverge, especially after reflection or refraction.

Function

A relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output.

Vertices

Plural of vertex, referring to the corners or angular points where two or more edges meet in a geometrical shape or graph.