Solve the system by substitution.
y=2x+70
y=-5x
a.10,-50
b.-10,-50
c.10,50
d.-10,50

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Evaluate 5 + 6 · 2 – 8 ÷ 4 + 7 using the correct order of operations. a. 22 b. 11 c. 27 d. 5