ok
step-by-step explanation:
y=-2.5x+12.5
5y=2x+10
y=0.4x+2
slope=-2.5
5=-2.5*3+b
b=12.5
answer: h=5.6 i don't really know how to put into words, so i though i would let you do that. i hope i was able to some
18 = 6(h)+1/2
18 = 6h+1/2
18-1 = 6h/2
17 = 3h
17/3 = h
h = 5.6
just pick what you think i need more time let me know if this