Answer:
length = 24 meters
Step-by-step explanation:
1. l = 2w
2. P = 2l + 2w
P=72
3. 72 = 2l + 2w
4. Substitute w=l/2 to solve for l
72 = 2l + 2(l/2) ---> 72 = 3L - Divide by 3 on both sides
L= 24 meters
Answer:
7a+1 +9 × 7a÷7a+2- 45 ×7a
7a+1 +9 × 1+2-45 ×7a
7a+1 +9 + 2-315a
7a+12-315a
12-308a
4(3-77a)
Answer:
the first one is correct
Step-by-step explanation: