18+18+l+l=52
36+2l=52
-36 -36
2l=16
÷2 ÷2
l=8
Length of the rectangle is 8
You would need to calculate the original cost with the tax then find the tip because the tip is always a percent out of the total cost including tax
This is my work hope it is correct. Do not add 0 at the end. Hope this helps!
Answer:
-1 and -5
Step-by-step explanation:
You must account for negative u values (which the abs nullifies).
So
and
is what we have to solve for.
As for usual equations, isolate the u variable.
5u + 15 = 10
5u + 15 (-15) = 10 (-15)
5u = -5

u = -1
Now you can do the same operation for the other equation and you should get u = -5.
Let's make sure we did it right by replacing u with one of our solutions (-1 or -5).

That's true. What about the other one?
