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1 year ago

A cyclist rode 3.75 miles in 0.3 hours. How much of an hour will it take her to go 4.5 miles?

Mathematics

2 answers:

Yuki888 [10]1 year ago

5 0

Answer:

2.05

Step-by-step explanation:

goldenfox [79]1 year ago

5 0

Answer:

It will take her 0.75 an hour to go 4.5 miles.

Step-by-step explanation:

I did 4.5-3.75=0.75. To check if that is right you would need to do 3.75+0.75=4.5.

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I need help with number 1

Ivan

The answer you have is good. You don't need to change anything.

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2 years ago

One sample has Aa Aa One sample has n 10 scores and a variance of s2 20, and a second sample has n 15 scores and a variance of s

siniylev [52]

Answer:

option (a) It will be closer to 30 than to 20

Step-by-step explanation:

Data provided in the question:

For sample 1:

n₁ = 10

variance, s₁² = 20

For sample 2:

n₂ = 15

variance, s₂² = 30

Now,

The pooled variance is calculated using the formula,

$S^{2}_{p} = \frac{(n_{1}-1)\times s^{2}_{1} +(n_{2}-1)\times s^{2}_{2}}{n_{1}+n_{2}-2}$

on substituting the given respective values, we get

$S^{2}_{p} = \frac{(10-1)\times 20 +(15-1)\times 30}{10+15-2}$

$S^{2}_{p}$ = 26.0869

Hence,

the pooled variance will be closer to 30 than to 20

Therefore,

The correct answer is option (a) It will be closer to 30 than to 20

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2 years ago

Write 224% as a fraction in Lowest term

Thepotemich [5.8K]

You should Google it because I forgot but others might know

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2 years ago

Marking Brainlist 7-9g+3g

coldgirl [10]

Answer:

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2 years ago

Bob has some 10 lb weights and some 3 lb weights. Together, all his weights add up to 50 lbs. If x represents the number of 3 lb

olga2289 [7]

Answer:

3x = 50 - 10y

Step-by-step explanation:

Here, x represents the number of 3 lb weights and y represents the number of 10 lb weights,

So, total weight of 3 lb weights = 3x

And, the weight of 10 lb weights = 10y

Total weight of all his weights = 3x + 10y

According to the question,

Total weight = 50 lb,

⇒ 3x + 10y = 50

Or 3x = 50 - 10y

Which is the required equation.

Second option is correct.

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2 years ago