Question

The width of a computer is 1.25 times its height. Find the height of the computer monitor at the right. Use a bar diagram to solve arithmetically. Then use an equation to solve algebraically.

Answer 1

The answer is 15 inches. If you let h stand for the height. Set them equal. 1.25 = 15. divide both sides by 1.25. h = 12

Answer 2

To solve such problems we should know about expressions and algebraic equations.

Expression

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations that are formed according to rules which are dependent on the context.

The height of the monitor is 12 inches.

Given to us

• The width of a computer is 1.25 times its height.
• Width of the computer monitor = 15 in.

Solution

Using the first statement to get an algebraic equation,

width = 1.25 height

$15 = 1.25x\\\\ x=\dfrac{15}{1.25}\\\\ x = 12\ in.$

Hence, the height of the monitor is 12 inches.

Learn more about Algebraic equations:

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