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NikAS [45]
3 years ago
7

what is the ratio for the surface areas of the rectangular prisms shown below, given that they are similar and that the ratio of

their edge lengths is 7:3?​

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
6 0

Answer:

D

Step-by-step explanation:

Given 2 similar figures with sides in the ratio a : b, then

ratio of areas = : a² : b²

Given that the ratio of the edges of the 2 similar prisms is

7 : 3, then

ratio of surface areas = 7² : 3² = 49 : 9 → D

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PLEASE NO LINKS, I will report you.
FromTheMoon [43]

Answer:

for 18 x is 6 and for 20 it is 11

Step-by-step explanation:

For 18, since -1+2x and 5+x is the same thing, set up and equation. WE can simplify to -1+x=5 and then we get x=6

For 20, 18 is 11 since 18=-4+2x. If we simplify we get 22=2x then we can use algebra to say that x=11

Hope this helps :)

7 0
3 years ago
Read 2 more answers
It is known that 10 workers take 30 days to complete a project. They start working and the next day one quits. the next another,
Burka [1]

Answer:

<h3>5 workers finish this work in 60 days</h3>

Step by step explanation:

The problem tells us that at the end of the day, there are only 5 workers left, which we must find how many days it takes to finish said work.

We start by finding the type of proportionality we have.

<em>In this case, we have that the more workers there are, they will finish that work in less time, and the fewer workers there are, the longer it will take to finish the work. This is the inverse proportionality, to more less, to less more.</em>

We have only 5 workers left.

In the first case there are 10 workers, and in the second case there are 5 workers left. We find the relationship between the workers in the second case among the workers in the first case.

<h3>Ratio = 5 workers / 10 workers = 1/2</h3>

We see that the time is found by dividing the number of days in which the 10 workers finish the work, by 1/2.

As we know, dividing two fractions is the SAME as multiplying by the inverse fraction.

\rm 30 * 2/1 \: = 60 \: days

By so

<h3>5 workers finish this work in 60 days</h3>
5 0
2 years ago
Write 1.49 x 10^-7 in standard form
Eduardwww [97]

Answer:

1.49

Step-by-step explanation:

1.49 \times 0.0000001 = 0.000000149 = 1.49

in this problem you also need to use scientific notation period to do scientific notation you need to go to the first non-zero digit after the decimal . and in this case that is one next thing you do is put the next numbers after the decimal that you just put in front of the one which is 49 in this case and that gives you your answer of 1.49

6 0
4 years ago
the suspects weight in pounds is equal to the cost of Jacob Wilson's family meal. If the family ordered 6 steak dinners, at 15.7
Alex17521 [72]

129.99

To do this you must multiply the price of all the steaks, then add the tax to that, then the tip.

So in conclusion, the suspect ways 129.99 pounds!

8 0
3 years ago
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Advocard [28]
To find the first number, just multiply the three numbers together.
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To find the second number, multiply the three numbers together along with another number (this number can be anything).
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4 0
4 years ago
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