Answer:
-$7
Step-by-step explanation:
20 - 15 = 5
5 + 5 = 10
10 - 10 = 0
0 - 7 = -7
1 - 3x = x + 3 |subtract 1 from both sides
-3x = x + 2 |subtract x from both sides
-4x = 2 |divide both sides by (-4)
x = 2/-4
x = -0.5
He paid 2.71 because a 15% tip of $2.36 bill is 35 cent
2= 2y - x
23 = 5y - 4x
isolate the x in the first equation
x = 2y - 2
now use this to substitute x in the second equation
23 = 5y - 4 (2y - 2)
23 = 5y - 8y + 6
23 = -3y + 6
-3y = 17
y = -5 2/3 (5.6 repeating )
now use that to find x in either equation.
2 = 2 (-5.66666) - x
2= -11.3 repeating - x
13.3 repeating = -x
x = -13.3 repeating
optional ** use the second equation to check
You’re supposed to put A on 1,-1
Q (2,-3) R (4,-3)
