Answer:
Option A. 65 trees
Step-by-step explanation:
From the question given:
50 trees was in the forest. Then 23 of them were cut down.
The remaining trees = 50 — 23 = 27 trees.
Now 38 new trees were plant.
Total trees after cutting and planting = 27 + 38 = 65 trees
First compute the perimeter of the pool:
(21+33)*2=108 foot.
Since the material cover 232 ft^2, then it is sufficient to divide the above number over the length of the border like this:
232/108=2.1
The trip can be 2.1 ft in wide.
Answer:
a₄=8n+1= -39.
Step-by-step explanation:
1) if a₁=3n; a₃=5n-6 and a₅=11n+8, then it is possible to calculate the difference according to 0.5(a₅-a₃)=0.5(a₃-a₁). Then
2) 0.5(11n+8-5n+6)=0.5(5n-6-3n); ⇔ 6n+14=2n-6; ⇔ n= -5.
3) if n=-5, then the 4th term is:
or a₄=-39.
Last one is correct
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