Half-perimeter=length+width=width+3+width=43, 2×width=40 so width=20cm and length=23cm.
One hundred twenty and ninety-five hundredths ?
Answer:
- 2 trees ($200 from either service)
- c=100+50t
- c=80+60t
Step-by-step explanation:
It can work well to solve problems like this by considering how many times the difference in per-tree costs it takes to make up the difference in one-time costs.
Here the difference of one-time costs is $20, and the difference in per-tree costs is $10, so it takes the pruning of 2 trees for the per-tree cost difference to equal the one-time cost difference (2×10 = 20).
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The cost equations are ...
cost = (one-time cost) + (per tree cost) × (number of trees)
c = 100 + 50t . . . . . company A
c = 80 + 60t . . . . . . company B
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If you use these equations to solve the problem, you want to find t such that the two costs are equal:
100 +50t = 80 +60t
(100 -80) = t(60 -50) . . . . . . . subtract 80+50t, factor out t
(100 -80)/(60 -50) = t . . . . . . . looks a lot like the verbal description above
The difference in fixed price divided by the difference in per-tree cost) is the number of trees required to make costs equal.
Answer:
a) 1/4 minute
Step-by-step explanation:
You can find the time using a proportion. It took 5 minutes to drain the entire 360 liters, so we can write the proportion as ...
time/volume = (5 min)/(360 L) = t/(18 L)
Multiplying by 18 L gives ...
t = (18/360)(5 min) = (5/20) min = 1/4 min
It took 1/4 minute to drain each 18 liters.
Answer:
Well you could think positive:
1: He will come back
2: He will be happy to see you
3: He deserves a good vacation after teaching
5: Think that you are happy that he is not leaving forever
If I would ever really like a teacher and he would be my favorite I would cry as well even if he left for 5 months only. it is okay to cry as well and think of your teacher and keep a smile on your heart. =)
Step-by-step explanation:
