A student needs to collect exactly 20 insects for a science project. The student has already collected 13 insects. Write an equation that can be used to find n, the number of insects the student still needs.
A. 13n = 20
B. n - 13 = 20
C. n + 13 = 20
D. 20 + 13 = n

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp