I'm pretty sure it is.
If i'm wrong, I'm truly sorry
Answer:
15% tip
Step-by-step explanation:
6/40= 0.15= 15%
-7x - 2y = 19
4x + y = -12
Set y equal to each other (opposite signs are fine and you could also set x equal instead of y)
-7x - 2y = 19
8x + 2y = -76
Add equations together
x = -52
Plug x value into an equation
4(-52) + y = -12
Solve for y
-208 + y = -12
y = 196
Hope this helps! ;)
the answer #1 is:40 tens and 3 ones
answer to #2 is: 50 tens and 5 ones
Answer is D 2.75,-2.5,-2.25
