5y +6z2 - y3 ; y=4 z=5
(i can't input exponents; the 2 in 6z2 is an exponent, and the 3 in y3 is, too.)

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.