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Zinaida [17]
3 years ago
14

36 percent of what is 99

Mathematics
1 answer:
mariarad [96]3 years ago
6 0

Let the number be x,

(x*36)/100 = 99

x*36 = 9900

x= 9900/36

x=275


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Two trains leave stations 360 miles apart at the same time and travel toward each other. One train travels at 70 miles per hour
cricket20 [7]
S=d/t     ⇒d=s*t
s=speed
d=distance
t=time

The first train :
d=x

x=70 miles/h*t                             ⇒   x=70t  (1)

The second train
d=360 miles - x

360 miles - x=80 miles/h*t          ⇒360-x=80t   ⇒ x=360-80t   (2)

therefore, with the equations (1) and (2) we have a systeme of equations:

x=70t
x=360-80t

we can solve this system of equations by equalization method.

70t=360-80t
70t+80t=360
150t=360
t=360/150=2.4     (≈2 hour  24 minutes)

Answer:  the first train meet with the second train in 2 hour 24 minutes. 


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3 years ago
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Kay [80]
He rounded to the hundredths place.
4 0
3 years ago
Write as a single fraction in its simplest form.
yaroslaw [1]

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2 years ago
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

The given two fractions are: $ \frac{5}{8} $ and $ \frac{8}{10} $.

Proportional fractions are those which have the same value when to reduced to the simplest form.

Consider two fractions $ \frac{p}{q} $ and $ \frac{x}{y} $.

We say they are proportional if $ p : q = x : y $.

Or, if $ py = qx $ then we can say the fractions are proportional.

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