Question

Four times a number increased by seven must be at least 31 but at most 55. Which interva

represents the values of the number in this situation?

Answer 1

6
`\leq` x
`\leq` 8

Explanation:

We'll represent the number with the expression 4x + 7

Then, we'll set up the inequality:

31
`\leq` 4x + 7
`\leq` 55

24
`\leq` 4x
`\leq` 48

6
`\leq` x
`\leq` 8