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Alex787 [66]
3 years ago
13

Stephen ran a race that was 5 miles long . he ran 1/4 of a mile in 1/8 of an hour . he ran the same pace the entire race , how l

ong , in hour did it take Stephan to run the entire race ?
Mathematics
2 answers:
atroni [7]3 years ago
7 0

Answer:

Step-by-step explanation:

No I just did this for points so yk

Nataly_w [17]3 years ago
5 0

Answer:

1/2 hour

Step-by-step explanation:

he ran 1.25 miles in 7.5 mins

so

1.25x=37.5

x=30 MINS

30 mins =.5 hours or 1/2 hours

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Heights​ (cm) and weights​ (kg) are measured for 100 randomly selected adult​ males, and range from heights of 139 to 192 cm and
Bumek [7]

Answer:

The weight of an adult male who is 158 cm tall is 59.32 kg.

Step-by-step explanation:

The regression equation representing the relationship between height and weight of a person is:

\hat y=-105+1.04 x

Here,

<em>y</em> = weight of a person (in kg)

<em>x</em> = height of a person (in cm)

The information provided is:

\bar x=167.77\ \text{cm}\\\bar y=81.54\ \text{cm}\\r(X, Y)=0.201\\p-value=0.045

The significance level of the test is, <em>α</em> = 0.01.

The hypothesis to test the significance of the correlation between height and weight is:

<em>H₀</em>: There is no relationship between the height and weight, i.e. <em>ρ</em> = 0.

<em>Hₐ</em>: There is a relationship between the height and weight, i.e. <em>ρ</em> ≠ 0.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level, then the null hypothesis will be rejected and vice-versa.

According to information provided:

<em>p</em>-value = 0.045 > 0.01

The null hypothesis will not be rejected at 1% level of significance.

Thus, concluding that there is no relationship between the height and weight.

Compute the weight of an adult male with height, <em>x</em> = 158 cm as follows:

\hat y=-105+1.04 x

  =-105+(1.04\times 158)\\=-105+164.32\\=59.32

Thus, the weight of an adult male who is 158 cm tall is 59.32 kg.

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3 years ago
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stealth61 [152]

The notation just means

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(f/g)(-4) = 18/13

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3 years ago
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Helen [10]

Answer:I believe your answer should be C: 23/15

Step-by-step explanation:

So you add 11/15 and 12/15 since the common denominator is already 15 you only need to add the numerator which is 11 and 12 and 11+12= 23 thus you get 23/15

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