3 years ago

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

Mathematics

1 answer:

TEA [102]3 years ago

3 0

Answer:

6 $\leq$ x $\leq$ 8

Step-by-step 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

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