Explain how you can prove the difference of two cubes identity. a^3 - b^3 = (a -b)(a^2 + ab +b^2)

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

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