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masha68 [24]
3 years ago
7

Find the percentage of 1 nickel and 4 pennies

Mathematics
1 answer:
Lyrx [107]3 years ago
7 0
It is equal to 9 cents
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16. What are the values of a and b?
MrMuchimi

Answer:

  a = 20; b = 2√101

Step-by-step explanation:

The triangle at upper left and the one at lower right are similar. Ratios of corresponding sides are equal, so ...

  200/a = a/2

  400 = a^2

  √400 = 20 = a

Then, by the Pythagorean theorem, the value of b can be found:

  b = √(a^2 + 2^2) = √(400 +4) = √4·√101

  b = 2√101

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3 years ago
Which of the following expressions is correct?
RUDIKE [14]

<em>l-37l=37 is the correct answer.</em>

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2 years ago
In 7 hours, Tony reads 42 chapters of a book,<br> What is his rate in chapters per hour?
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6 chapters/hour

Step-by-step explanation:

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Nate rented a power washer and a generator. On his first job, he used each piece of equipment for 6 hours which cost $90. On his
sp2606 [1]

Answer:

Step-by-step explanation:

p = power washer and g = generator

6p + 6g = 90 .....multiply by 4

4p + 8g = 100 ....multiply by -6

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

24p + 24g = 360 (result of multiplying by 4)

-24p - 48g = -600 (result of multiplying by -6)

---------------------add

-24g = - 240

g = -240 / -24

g = 10 <=== the generator cost $ 10 per hr

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6p + 6(10) = 90

6p + 60 = 90

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6p = 30

p = 30/6

p = 5 <==== the power washer costs $ 5 per hr

check...

4p + 8g = 100

4(5) + 8(10) = 100

20 + 80 = 100

100 = 100 (correct)

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there are 60 minutes per hour

24/60 = 0.4 miles per minute

0.4*5 = 2

they will ride 2 miles in 5 minutes

4 0
3 years ago
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