Find the area of an equilateral triangle with apothem length 4 cm. If necessary, write your answer in simplified radical form.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?