They will tip $8.10.
How to Do it/ Work:
18 * 0.45 = 8.1
Remember y ou can do anything to an equation as long as you do it to both sides
get 1x by itself
8x-12=4x+24
add 12 to both sides
8x=4x+36
minus 4x from both sides
4x=36
divide both sides by 4
x=9
Answer:

Step-by-step explanation:
A zero or a root is determined at the point where the curve cuts or meets the x-axis or horizontal axis.
What this doesnt make sense