The average height of a class of 18 students is 105 cm after arrival of 7 new students the average decrees by 5 cm. find sum of height of all the students of the class.

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Solve the word problem. the table shows the low outside temperatures for monday, tuesday, and wednesday. by how many degrees did the low temperature increase from monday to tuesday? this function table shows the outside temperature for a given a. 21.1⁰ b. 8.6⁰ c. 4.9⁰ d. 3.9⁰(the picture is the graph the the question is talking about.)

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2