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3 years ago

A train moves at a constant speed of 8 miles every 6 minutes. How far will the train in 3 minutes, 15 minutes, and 60 minutes.

Mathematics

2 answers:

Valentin [98]3 years ago

6 0

Answer:

3.9, 19.5, and 78 miles

Step-by-step explanation:

8 divided by 6 = 1.3 1.3 miles = 1 hr

1.3 x 3 = 3.9

1.3 x 15 = 19.5

1.3 x 60 = 78

densk [106]3 years ago

6 0

Answer: If the train moves a constant speed of 8 miles for every 6 minutes then if the time where to be 3 minutes you would have to divided 2 and 8 because the time was split in half you would also have to split the 8 as well. Now if the time was 15 minutes you would have to add more since 6 got 9 more you will have to add 9 more to 8.

6 minutes = 8 miles

3 minutes = 4 miles

15 minutes = 17 miles

Hope this helps you :3.

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2.5+0.15p=0.4p what value of p makes the equation true?

kykrilka [37]

Answer:

x=10

Step-by-step explanation:

Rearrange to get p on one side

2.5=0.4p-0.15p

2.5=0.25p

Divide both sides by 0.25

2.5/0.25=x

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3 years ago

If 332 students brought shirts and there are 830 students at the school what percents of the student brought shirts

Anika [276]

Answer: 40%

Step-by-step explanation: What I like doing with problems like this is work backward, so that is how this explanation is going to work.

830*0.40=332 so that is how I got 40% now lets dig a little deeper.

How to find percent is take the whole and times it by the decimal of percent you want (eg. if 400 is my whole I want to find out what 30% of it is I would do 400*0.30)

So then we take our 830 times it by what we think best fits and that's how I solved it!

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3 years ago

Amy purchased 17 pencils and 18 pens for a fund-raiser at school and spent $61.50. Jocelyn purchased 10 pencils and 21 pens and

tresset_1 [31]

Let,
pencils be "x"
pens be "y"

According to the question,
17x + 18y = 61.50 ----------> equation (1)
10x + 21y = 57 -----------------> equation (2)

Now,
Taking equation (1),
17x + 18y = 61.50
18y = 61.50 - 17x
y = (61.50 - 17x ) / 18 -----> equation (3)

Now, substituting the value of "y" in equation (2), we get,

$10x+21( \frac{61.50-17x}{18} )=57$

$10x+7( \frac{61.50-17x}{6} )=57$

$10x+ \frac{430.50-119x}{6}=57$

$10x* \frac{6}{6} + \frac{430.50-119x}{6}=57$

$\frac{60x}{6} + \frac{430.50-119x}{6}=57$

$\frac{430.50+60x-119x}{6}=57$

$430.50-59x=57*6$

$430.50-59x=342$

$59x=430.50-342$

$x=\frac{88.5}{59}$

$x=1.5$

Now,
Substituting the value of "x" in equation (3), we get,

$y =\frac{61.50-17x}{18}$

$y =\frac{61.50-17(1.5)}{18}$

$y =\frac{61.50-22.5}{18}$

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$y =2.17$

$y =2$ approx. (rounded)

So, Each pencil costs $1.5 and each pen costs $2.

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3 years ago

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OLga [1]

Answer:

Step-by-step explanation:

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