When two people play tennis it is called singles. when 4 people play it is called doubles. in doubles it is 2 players playing against 2 players. below or above is a diagram of a tennis court. the net divides the court in half. the two alleys on the sides are used only in doubles. what is the total length of a tennis court

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Aline passes through 3,7 and 6,9 what equation represents the line

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)