Answer:

Step-by-step explanation:
First, expand the original equation:
(x + 1)(2x + 3)

Now simplify:

And that's your answer!
Answer:
3 < x < 17
Step-by-step explanation:
Given 2 sides then the possible range of the third side x is
difference of 2 sides < x < sum of 2 sides , that is
10 - 7 < x < 10 + 7
3 < x < 17
Answer:
x = - 3.42443 or 6.42443
Step-by-step explanation:
Amount spent on the last call = $25 - $22.04 = $2.96 = 296 cents
Number of minutes used for last call = 296 / 8 = 37 minutes.