People were timed while completing two different puzzles. There are 150 people that completed the first
puzzle and the mean time was 16 minutes. There are
200 people that completed the second puzzle and the
mean time was 13 minutes. Calculate the mean time of
the 350 people. Round decimals to the nearest tenth.

How to determine whether two known pairs of points are on the same line.

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.