Question

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

Answer 1

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

Step-by-step 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<(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.