Answer:
C. Carolyn did not subtract 4 from both sides of the equation.
Step-by-step explanation:
3x-2(x+2)=7 should be 3x-2x-4=7 not 3x-2x+4=7
Answer:
The coordinates are: (-3,-4).
Answer:
y = 60, x= 50
Step-by-step explanation:
y + 120 = 180
subtract 120 from both sides
y = 60
60 + 70 = 130
x + 130 = 180
subtract 130 from both sides
x = 50
8x9=72 ft squared
4x3=12 ft squared
72+12=84 ft squared