Answer:
-7
Step-by-step explanation:
I am assuming that you meant y=-7x+9
so the the slope would be y=mx+b
so -7
Answer:16
95/5=19
19-3=16
3 is the money he already saved in weeks
b=3.1cm
2a+b=15.7
a=6.3
2*6.3+b=15.7
12.6+b=15.7
16
2x2-y
2(3)2-2
2(9)-2
18-2