Question

Decide which expression would be used to complete the sentence:

A sundae cost n dollars. Then 7 sundaes cost _____ dollars.
a. n/7 d. 7 - n
b. 7/n e. n - 7
c. 7n f. n + 7

Answer 1

The expression for 7 sundaes cost __ dollars will be: 7n

Thus, option C i.e. 7n is correct.

Explanation:

Given

A sundae cost n dollars.

To determine

7 sundaes cost _____ dollars?

It is stated that A sundae cost n dollars, it means:

The cost of one sundae = n dollars

Thus,

The cost of 7 sundaes can be calculated by multiplying 7 by n dollars.

Therefore,

The cost of 7 sundae = 7n dollars

Hence, the expression for 7 sundaes cost __ dollars will be: 7n

Thus, option C i.e. 7n is correct.