P = s + (s + 5) + (s + 5) This represents the two sides that are 5 inches longer than the base (s + 5) and the base (s). Simplifying. 100 = 3s + 10 subtract 10 from both sides 90 = 3s divide both sides by 3 30 = s base = 30 sides = 35
The answer is D. Because, for every 50 emails dent he received 30 back in response. So, let 5 represent the emails he sent and let 3 represent the emails received... so your answer should be D: 5:3.
