# To express: the given quantity in terms of the indicated variable. ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071 ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

#### Solutions

Chapter 1.6, Problem 9E
To determine

## To express: the given quantity in terms of the indicated variable.

Expert Solution

160+s3 .

### Explanation of Solution

Given:

The given quantity is “the average of three test score”.

The first two scores are 78 and 82 respectively.

Concept used:

Average is to find by sum of all terms divided by number of terms.

Avg=sum of all termsTotal num. of terms

Calculation:

According to question, the first two score are:

score1:78score2:82

And the third score is s.

As the average is to find by sum of all terms divided by number of terms.

Therefore,

Avg=78+82+s3=160+s3

Hence,the average of three test scoreis 160+s3 .

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