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3 years ago

You had 250 minutes left on your cellphone and you talk an hour a week

Mathematics

1 answer:

hjlf3 years ago

3 0

Let w = the number of weeks you talked on your cell phone

60 min = 1 hr

60w + 250 = total number of minutes

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4+2(6+15)<br><br> HELP PLSSSSSS

Airida [17]

Answer:

Step-by-step explanation:

Multiply the two by both numbers inside the parenthesis

2 x 6 = 12 2 x 15 =30

Add those numbers together

12 + 30 = 42

Then add the remaining four to that number

4 + 42

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2 years ago

Response will be saved automatically.

Charra [1.4K]

Answer:

443.28

Step-by-step explanation:

Subtract 42.24 from 570.3 three times.

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3 years ago

A 7th-grade class has 14 girls and 10 boys. An 8th-grade class has 11 girls and 13 boys. What is the probability of picking a st

melomori [17]

Answer:

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Step-by-step explanation:

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3 years ago

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 48.0 and 58.

Yanka [14]

Answer: 0.025

Step-by-step explanation:

Given : A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between the interval [48.0 minutes, 58.0 minutes].

The probability density function :-

$f(x)=\dfrac{1}{58-48}=\dfrac{1}{10}$

Now, the probability that a given class period runs between 50.25 and 50.5 minutes is given by :-

$\int^{50.5}_{50.25}\ f(x)\ dx\\\\=\int^{50.5}_{50.25}\ \dfrac{1}{10}\ dx\\\\=\dfrac{1}{10}|x|^{50.5}_{50.25}\\\\=\dfrac{1}{10}\ [50.5-50.25]=\dfrac{1}{10}\times(0.25)=0.025$

Hence, the probability that a given class period runs between 50.25 and 50.5 minutes =0.025

Similarly , the probability of selecting a class that runs between 50.25 and 50.5 minutes = 0.025

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2 years ago

Increase R700 in the ratio 3:2<br>

babymother [125]

Answer:

3 over5 multiplied by 320 equals 192

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2 years ago