Choose an expression that matches the following sentence: The sum of 5 times a number plus 2. A. 5x + 2 B. 5 + 2 C. 5x – 2 D. 2 + 5 + x E. 2 - 5

Solve the system of equations. y= 2x y= x^2 - 15

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.