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AnnZ [28]
3 years ago
8

Select the better deal in the pair. Then give the unit rate for the better deal.

Mathematics
1 answer:
ella [17]3 years ago
5 0
The better deal is 81.05/20.
The unit rate for 21/5 is:
4.2:1

And the better deals unit rate is:
4.06:1
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from the top of a barn 25 feet tall, you see a cat on the ground. The angle of depression to the cat is 40°. How many feet must
Tanya [424]

Answer:

21 feet (20.977)

Step-by-step explanation:

1. Draw a picture, it makes it much easier. Draw a right triangle with the vertical labeled 25 and the horizontal labeled X, then label the angle adjacent to the horizontal and hypotenuse 40°

2. Use tangent because X is opposite of 40 and 25 is adjacent to angle 40. the equation would be Tan40/1 = X/25

3. You then cross multiply to get 25Tan(40) = X

4 You then plug it into a calculator and get the full answer of 20.97749078, but I always round up to either 20.98 or 21 feet, whatever your teacher allows

8 0
3 years ago
Mark cycles from home to school at a speed of 16 kilometers per hour. He cycles back on the
katrin [286]

Answer:

Write a time equation, time = dist/speed

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go time + return time = total time

d%2F16 + d%2F15 = 7.75 hrs

multiply equation by the least common multiple 240, cncel the denominators:

 

15d + 16d = 240(7.75)

31d = 1860

d = 1860/31

d = 60 km one way

total dist = 120 km

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Check this, find the actual time each way

60/16 = 3.75 hrs

60/15 = 4 hrs

-----------------

total time 7.75 hrs

Step-by-step explanation:

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2 years ago
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7 0
3 years ago
Help me please help me, I need the answer because only have 1 hour for finish and my grades is so bads and these is extra credit
LekaFEV [45]

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Step-by-step explanation:sad

8 0
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