Question

Five more than twice a number is less than 20 . If the number isa whole number, what could the number be?

Answer 1

Answer:

D. The number could be 1,2,3,4,5,6 or 7.

Explanation:

Let the number = n

Twice the number = 2n

Five more than twice a number = 2n+5

If the expression above is less than 20, we have:

$2n+5<20$

We solve for n.

$\begin{gathered} 2n<20-5 \\ 2n<15 \\ n<\frac{15}{2} \\ n<7.5 \end{gathered}$

Since n is less than 7.5, the number could be 1,2,3,4,5,6 or 7.