Solve the system of linear equations below.

2x + y = 5
x + y = 4

i don't just want the answer can someone explain how to do this?

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 is the slope of the equation y =

How to use order of operation in 20 divide by 4 multiply 5 = 1