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Elenna [48]
3 years ago
12

What is the sum of 8a 7+ 5b2 – 2a2 and 7b2 + 66_ 20a + 3?

Mathematics
1 answer:
barxatty [35]3 years ago
5 0

Answer:

Step-by-step explanation:

7+5b²-2a²+7b²+66-20a-3

first collect like terms

5b²+7b²-2a²-20a+7-3

12b²-2a²-20a+4

hope it's helpful

THANK YOU.

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What is the next term of the arithmetic sequence? -7 -7 1 5 9
Fed [463]

Answer:

No solution, this is not an arithmetic sequence

Step-by-step explanation:

An arithmetic sequence is the same number being added over and over. This is not the case.

8 0
3 years ago
The mean value of 8 numbers is 17. Three of these numbers (9, 11, and 20) are discarded.
Viktor [21]

Answer:

19.2

Step-by-step explanation:

You get the mean of a set of numbers by adding them and dividing the sum by how many numbers there are.  In this case, you don't know what the individual 8 numbers are, but you can find out what they add up to.

Mean = (sum) / 8

17 = (sum) / 8

17 x 8 = sum

136 = sum

Now take out the numbers 9, 11, 20, which reduces the sum by 40.  There are 5 numbers left and they add up to 136 - 40 = 96.

The new mean is 96 / 5 = 19.2

3 0
4 years ago
Augustus ruled the roman empire from 27 BC to AD 14.For how many years did he rule?<br><br><br>​
Lyrx [107]

Answer:

41

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
if the unicorn seat on a merry-go-round is 5 feet from the center, and the merry-go-round completes a full rotation in 6 seconds
monitta
Well, You would divide 5 into 6 to get 0.8333.  The unicorn travels 0.8333 in one second.  Which is your answer. 

And to check your answer you would then you would multiply 0.8333 by 6 to get 4.9998, which is rounded to 5.  Great, you did it, and your finished, good luck!
4 0
4 years ago
What is the value of X
alexdok [17]

Answer:

x=12

Step-by-step explanation:

We have been given a graph of similar triangles. We are asked to find the value of x.

Since we know that corresponding sides of similar triangles are always in same proportion, so we will use proportions to find the length of x.

\frac{3}{x+3}=\frac{4}{16+4}

\frac{3}{x+3}=\frac{4}{20}

Upon cross multiplying our equation we will get,

4*(x+3)=3(20)

Upon distributing 4 we will get,

4x+12=60

Let us subtract 12 from both sides of our equation.

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Upon dividing both sides of our equation by 4 we will get,

\frac{4x}{4}=\frac{48}{4}  

x=12  

Therefore, the value of x will be 12.

4 0
3 years ago
Read 2 more answers
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