Question

1. Write each phrase as a mathematical expression.

Mathematical

Expression

Phrase

1

nine increased by a number

fourteen decreased by a number

seven less than a number

the product of nine and a number

thirty-two divided by a number

five more than twice a number

the product of a number and six

seven divided by twice a number

three times a number decreased by eleven

withdrawing $10 every week from an outstanding

balance of $400

Answer 1

Answer and explanation:

x here represents the unknown number or value

9+x here nine is increased by x the unknown number

14-x fourteen is decreased by x the unknown number or value

x-7 the unknown number is decreased by seven

9*x nine is multiplied by an unknown number

32/x thirty two is divided by an unknown number

2x+5 double an unknown number increased by 5

x*6 unknown number multiplied by 6

7/2x seven divided by double an unknown number

3x-11 thrice an unknown number reduced by 11

400-10x weekly withdrawals of 10 from 400