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Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447

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Chapter
Section
BuyFindarrow_forward

Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447
Textbook Problem

Set up and solve equations for each of the following business situations.

A regular lightbulb uses 20 watts less than twice the power of an energy-saver lightbulb. If the regular bulb uses 170 watts, how much does the energy-saver bulb use?

To determine

To calculate: The power of energy saver bulbs, if the power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb and the power used by regular bulb is 170 watt.

Explanation

Given Information:

The power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb and the power used by regular bulb is 170 watt.

Formula used:

To solve the equation and prove the solution, follow the steps as mentioned below.

Step 1: Understand the problem and write the facts of the equation.

Step2: List the known and the unknows from the problem.

Step3: Write the equation with the help of following table of key word,

Equal Sign

Addition

Subtraction

Multiplication

Division

Parentheses

Is

And

Less

of

Divide

Times the quantity of

Are

Added to

Less than

Multiply

Divided by

Was

Totals

Smaller than

Times

Divided into

Equals

The sum of

Minus

Product of

Quotient of

Gives

Plus

Difference

Multiplied by

Ratio of

Giving

More than

Decreased by

Twice

Leaves

Larger than

Reduced by

Double

Results in

Increased by

Take away

Triple

Produces

Greater than

Loss of

At

yields

exceeds

Fewer than

@

Step4: Solve the equation by rearrange the unknown values to the left side and known values to right side of the equal sign.

Step5: Prove the solution by substituting the value obtained from step 4 in the equation formed in step 4 then check the left and right of the equation if, they are equal then the answer is correct.

Calculation:

Suppose that X be power used by energy saver bulbs.

Underline the keyword by using the table of key word.

Consider the power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb

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