David gets to work in 20min when he drives his car. Riding his bike (by the same route) takes him 45min. His average car speed is 4.5mph greater than his average speed on his bike. How far does he travel to work?

What is the value of y? round to the nearest tenth

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7