Darnelle drew this figure and the accompanying equations.

w + x + y = 180 y + z = 180which equation must also be true?
a
w + z = 180
b
y – x = w
c
w + x + z = 180
d
w + x = z

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.