1.) evaluate the expression
3(n+4)-7n when x=1/2

2.)simplify the expression
m. y+y+y-8+2y

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.

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

How many solutions does the nonlinear system of equations graphed below have?