Answer:
0
Step-by-step explanation:
x2 +4x-21=0. solve for x


Answer:
53lbs.
Step-by-step explanation:
If Kevin bought 3 20lbs. Bags of gravel he would have 60 lbs. of gravel. In the end he has 7 lbs. of gravel left he used 53 pounds.
Equations:
7+x=60 or 60-7=53 lbs.
Answer:
(4+x) + x = 18; 2x=14; x=7; width = 7, length = 11
Step-by-step explanation: