Question

Anna found the difference between thirteen and the product of four and a number. Which expression represents this phrase, and what is its value if n = 3?

A) 13; when n = 3 the value is -127
B) 13 - 4n; when n = 3 the value is 1
C) 4n - 13; when n = 3 the value is -1
D) 13 - n; when n = 3 the value is 12

Answer 1

The correct expression is Option B) 13 - 4n, and when n=3, the value of the expression is 1.

Step-by-step explanation:

The expression that represents the phrase 'the difference between thirteen and the product of four and a number' is 13 - 4n. To find its value when n = 3, we substitute 3 for n in the expression:

13 - 4(3) = 13 - 12 = 1.

Therefore, the correct expression and value for n=3 is 13 - 4n, and the value is 1.