Answer: y=29, x=-3
Step-by-step explanation:
eq. 1: 9x+y=2
9 • -3+y=2
-27+y=2
y=29
eq. 2: -4x-y=-17
4x+y=17
5x=-15
x=-3
2.5 is the geometric mean
Answer:
Step-by-step explanation:
And 13 to both sides to get 30 on the left
Divide by -8 to get -3.75
Additive property of length. if you add the two sides it comes out to equal half the whole side