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Scrat [10]
3 years ago
13

If it takes Matthew an hour to get to his friends house, and two hours if he drives 25 mph slower, how far away does Matthews fr

iend live?
Mathematics
2 answers:
snow_tiger [21]3 years ago
7 0
Speed = distance/time

distance = speed * time

d = st

Let distance = d; faster speed = s; t = time

At the faster speed:

d = s * t

d = s * 1

d = s

At the slower speed:

d = st

d = (s - 25)* 2

d = 2s - 50

We now have two equations,

d = s
d = 2s - 50

We can equate the right sides

s = 2s - 50

-s = -50

s = 50

The faster speed is 50 mph.
It takes him 1 hour at the faster speed.

d = st

d = 50 mph * 1 hr

d = 50 miles

Answer: the distance is 50 miles
lbvjy [14]3 years ago
6 0
50 miles gggggggggggggggggtffgfffffgfggfff
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Answer:

145454.4

Step-by-step explanation:

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A sample with which of these variances has a standard deviation that is greater than the variance?
rusak2 [61]
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We need to get the square root of each variance to see whether its standard deviation is greater than its variance.
A. 0.25 ⇒ √0.25 = 0.50B. 1.75 ⇒ √1.75 = 1.32C. 2.5 ⇒ √2.5 = 1.58D. 1.5 ⇒ √1.5 = 1.22
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6 0
3 years ago
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Nimfa-mama [501]

Answer: No, this is not necessarily evidence that the proportion of Americans who are afraid to fly has increased.

Step-by-step explanation:

Since we have given that

n = 1400

x = 154

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H_0:\hat{p}=p\\\\H_a:\hat{p}>p

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At 5% level of significance,

critical value would be 1.96.

Since 1.96>1.25.

so, we will accept the null hypothesis.

Hence, no, this is not necessarily evidence that the proportion of Americans who are afraid to fly has increased.

3 0
3 years ago
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4 years ago
Read 2 more answers
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