Answer:
84. What you did is right.
Step-by-step explanation:
A parallellogram's area is b x h. So the equation is 7 x 12=84.
Answer:

Step-by-step explanation:
Keep
and group -3x+8x which becomes 5x. Then keep -6.
Then it becomes the answer above.
8 ft= ___ inches
1 ft= 12 inches
8 ft= 12 x 8 inches
8 ft=96 inches
She has 96 inches, but she needs 100 inches. So she needs 4 more inches of lumber.
Answer:
the answers are:x1=-4 and x2=5