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Dahasolnce [82]
3 years ago
7

A train travels 63 kilometers in 2 hours, and then 87 kilometers in 2 hours. What is its average speed?

Mathematics
2 answers:
Arlecino [84]3 years ago
8 0
150 kilometers per hour have this answer by mind
Lesechka [4]3 years ago
6 0
87 - 63 = 14
14/2 = 7
7kmph
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The formula for the volume of a cylinder is V = pir2h. Solve the formula for the height h.
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H=v/(2pir)

You just have to isolate h. To do that you are going to divide both sides by 2pir. 
5 0
3 years ago
What is the solution to this system of equations?
Rashid [163]
X=45
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4 0
3 years ago
3. Which number has the greatest absolute value?<br> A)|-3|<br> B)|-8|<br> C)|2|<br> D)|5|
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Answer:

B

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7 0
3 years ago
Please tell the answer and show the work.
LUCKY_DIMON [66]
First step, i would try to figure out the slope. think of it as a typical y=mx+b linear equation as you check out the graph.

it's just rise over run (rise up this many, run over that many), and your options are (-2/3) or (-3/2)

start at the y-intercept, which is just above the middle of the graph. if you go down 2 and try to go over 3, you hit the line before you can count 3 units. that means this slope is incorrect.

go back to the y-intercept. down 3, over 2--there you go. your slope here is (-3/2), which immediately gets rid of half your answer choices for having the wrong slope

the next thing you have to do is decide <em>where</em> this graph should be shaded. the shaded region shows the domain; the white region shows what's outside of your domain. this inequality is shaded "below" which means that the y values are LESS than "(-3/2)x +1"

that eliminates another one of your answer choices; choice 3 is correct. the inequality is y < (-3/2)x + 1

if the graphs of inequalities are shaded below and the line is dotted, it's less than. if the graphs of inequalities are shaded above and the line is dotted, it's greater than. general rules for ya
5 0
3 years ago
Read 2 more answers
Simplify each expression. 1-4b+3b+11
meriva
The correct answer is -b+12
5 0
3 years ago
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