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Alina [70]
3 years ago
13

Marie is riding her bike at 15 miles per hour. What is her rate of speed in feet per second?

Mathematics
1 answer:
stepladder [879]3 years ago
7 0

Answer:

22(c)

Step-by-step explanation:

Our current proportion is

15 miles

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

1 hour

We need feet per second.

Lets convert!

15 miles= 79200 feet(used googl to find this)

1 hour=3600 seconds(also used googl to find this)

( i know its not spelled that way brainly wont let me write the whole word out)

Now, our proportion is:

79200 feet

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

3600 seconds

HOWEVER, this can be simplified!!!!

79200/3600=22

Final answer: 22, or C.

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There are 205 coins in a jar all of which are either nickles or quarters . The vaule of the coin in the jar is $31.85. if both o
Gnesinka [82]

Answer: There are 97 nickels and 108 quarters.

Step-by-step explanation:

Let x = Number of nickels, y = Number of quarters.

As per given,

x+y = 205    ...(i)

0.05x+0.25y = 31.85 ... (ii)    [1 nickel = $0.05, 1 quarter = $ 0.25]

Multiply (ii) by 20, we get

x+5y=637   ...(iii)

Eliminate (i) from (iii)

4y = 432

⇒ y = 108 [Divide both sides by 4]

Put value of y in (i), we get

108+x=205\Rightarrow\ x= 97

Hence, there are 97 nickels and 108 quarters.

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3 years ago
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3 0
3 years ago
You have determined that the equations x+1=y​ecks plus one is equal to why and −3x+5=y​negative three ecks plus five is equal to
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2 years ago
Convert each fraction to a decimal then a percent 4/25 3/11
sashaice [31]

Answer:

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Step-by-step explanation:

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Source:
http://www.1728.org/trictr.htm


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3 years ago
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