sarah work at a concession stand for 2 hours and erans 22.50$, but if she works for 4 hours she earns $45. what is the rate of change

Which sentence uses an objective tone? we will plant the best garden of any school in the area. the new campus garden will surely be envied by other schools. a garden would provide numerous benefits to the students. you will probably agree that gardens have many benefits.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Solve the triangle. a = 21°, c = 105°, c = 5