What value of r makes this equation true? justify your solution.
0.4r - 7 = -.3r +2.8

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

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

Solving algebraic equations 2m+3=11