What is the degree measure of a semicircle

What could explain what happened when the time was equal to 120 minutes

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.