If (r, s) is the solution to the system of equations, what is the value of r?

−8r − 8s = 100 r − 2s = 10

A) −5
B) − 15/2
C) 5
D) 15/2

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

What are “like terms”? why can we only add like terms?

An equation where variables are used to represent known values—function notation true or false