Could someone help me out? Select the letter of the correct answer.

Suppose a 56-year-Aid teacher gets tech support from her student. If the teacher is four times the age of her student, how old is the student?

A 11 years old

B 9 years old

C 15 years old

D 14 years old

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

Do,h = (7, 9) (14, 18) the scale factor is

The equation shown below represents function f. f(x)= -2x+5 the graph shown below represents function g. which of the following statements is true? a. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is less than the y-intercept of function g. b. over the interval [2, 4], the average rate of change of f is greater than the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. c. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. d. over the interval [2, 4], the average rate of change of f is less than the average rate of change of g. the y-intercept of function f is the same as the y-intercept of function g.