"Fuel economy" = "miles per gallon" = (distance traveled) divided by (gallons used)
mpg = (226 miles) / (10.5 gallons) = <u>21.52 miles per gallon</u> (rounded)
It makes absolutely no difference whether the trip took 4 hours or 4 years.
That information is there just to try and trip you up. You don't need it.
Answer:
x=-6
y=3
Explanation:
y=-4x-21
8x+8y=-24
y=-4x-21
8x+8(-4x-21)=-24
y=-4x-21
-24x-168=-24
y=-4x-21
x=-6
y=-4(-6)-21
x=-6
y=3
x=-6
(-6,3) this is in point form in case you need it
To add 11% to an amount means to multiply the amount by 1.11.
You can start with $115 and multiply it by 1.11 eleven times.
A quicker way is to find 1.11^11 and then multiply by $115.
$115 * 1.11^11 = $115 * = 3.151757 = $362.45