Find all values of k for which the following system has only one solution:
2x+y=7
y-kx=3

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Equation for the calculation double 2 and then add 5

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1