Suppose the whole job has three parts: front, back, and side. If the back takes twice as long as the side and the front takes twice as long as the back, what fraction of the whole job is the side? Notation: w = time for whole job; x --- time for side lawn.

What will be an ideal response?


Use the given notation to form an equation showing the whole job consists of three parts:
x = side
2x = back (because back is twice the side) 4x = front (because front is twice the back) w = whole job (the sum of the three parts)
Thus: w = x + 2x + 4x adding gives w = 7x
From this equation you can see that the whole job take 7 times as long as the back alone. Thus, the back is 7 of the whole job. You can see this more clearly by dividing both sides of the equation by seven:
Start with the equation above w =7x
Divide both sides by 7 to get a new equation w/7 =7x /7
Remove 7 / 7 since it is one, leaving 7w—x
Express the final equation in English
"One-seventh of the whole job is equal to the time for the side alone."

Computer Science & Information Technology

You might also like to view...

Apps that are available from sources other than the Apple App Store require a(n) authorized change to the device's software.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

When two computers are connected using Windows Remote Assistance, the desktop of the computer needing help is called:

A) Remote Assistance novice B) Microsoft Knowledge Base C) Remote Assistance expert D) Windows Remote Assistance

Computer Science & Information Technology

The Mini Translator can be used to translate ONLY single words

Indicate whether the statement is true or false

Computer Science & Information Technology

________ means responding to risk by not taking a risky action.

A. Risk reduction B. Risk transference C. Risk acceptance D. Risk avoidance

Computer Science & Information Technology