Question

For each situation, write an expression answering the question. The expression should only

use multiplication,
a. A person's salary is $2,500 per month. She receives a 10% raise. What is her new salary,
in dollars per month?
b. A test had 40 questions. A student answered 85% of the questions correctly. How many
questions did the student answer correctly?
C. A telephone cost $250. The sales tax is 7.5%. What was the cost of the telephone
including sales tax?

Answer 1

The expressions for each statement are as follows:

a: 2500+(0.10*2500)

b: 40 * 0.85

c: 250 + (0.075*250)

Explanation:

Part a:

Given

Salary = $2500

Percentage of raise = 10%

The new salary will be:

`= 2500+ (10\%\ of\ 2500)\\=2500 + (0.10*2500)\\=2500+250\\=\$ 2750`

Part b:

Given

Total questions = 40

Percentage of correct answers = 85%

The required expression for correct answers is:

`= 85\%\ of\ 40\\= 0.85*40\\=34`

Part c:

Given

Price of phone = $250

Percentage of sales tax = 7.5%

The required expression is:

`Cost\ with\ sales\ tax = 250 + (7.5\%\ of\ 250) \\= 250 + (0.075*250)\\=250+18.75\\=268.75`

Hence,

The expressions for each statement are as follows:

a: 2500+(0.10*2500)

b: 40 * 0.85

c: 250 + (0.075*250)