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lubasha [3.4K]
3 years ago
9

Decide whether the rates are equivalent. 30 beats per 20 second 90 beats per 60 seconds

Mathematics
1 answer:
MariettaO [177]3 years ago
4 0

Answer:

Yes

Step-by-step explanation:

Per 60 second divide by per 20 seconds = 3.

90 beats divided by 30 beats = 3.

Does 3 = 3?

Yes, which means that the answer to the question is yes.

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Aleksandr [31]

a = ( 1 , 6 )

b = ( 4 , 9 )

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Now just need to put the coordinates in the above equation :

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5 0
3 years ago
The two solids are similar and the ratio between the lengths of their edges is 2:7 what is the ratio of their surface areas?
vovangra [49]

Answer:

The ratio of their surface areas is \frac{4}{49}

Step-by-step explanation:

we know that

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and

Remember that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared

therefore

In this problem the ratio of their surface areas is (\frac{2}{7})^{2}=\frac{4}{49}

8 0
3 years ago
5.)which of the following is the best example of pair of lines that are parallel?
sergij07 [2.7K]

Answer:

D

Step-by-step explanation:

D because it is the only choice that obtains things that do not intersect or cross each other at some point. The doors would never cross, unlike the windows or roadways or railways.

So option D would be the best answer.

4 0
3 years ago
The lengths of three sides of a triangle are (x + 6) inches, (2x - 2) inches, and (2x+ 6) inches.
Kamila [148]

Answer:

21 inches answer F

Step-by-step explanation:

x+6+2x-2+2x+6=85

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MArishka [77]

Answer:

x=5

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so x is equal to 5

6 0
3 years ago
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