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kotykmax [81]
3 years ago
6

(a +2b)2 + 4b² - a²​

Mathematics
1 answer:
jeyben [28]3 years ago
3 0

Answer:

a^2+4b^2+2a+4b

Step-by-step explanation:

(a +2b)2 + 4b² - a²​

=2a+4b+4b^2+a^2

=a^2+4b^2+2a+4b

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Answer:

Step-by-step explanation: explique melhor

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3 years ago
A two digit number is such that the sum of the ones and the tens digit is ten. If the digits
Tema [17]

Answer:

The original number is 28

Step-by-step explanation:

start by listing all possible combinations of digits that give 10 when added:

19 (1+9=10)

28 (2+8 =10)

37 (3+7=10)

46 (4+6=10)

55 (5+5=10)

Look into the order of digits reversed and what the difference with the original number gives:

1)  19  reversed is 91 then when we subtract 91 - 19 we obtain 72

2) 28 reversed is 82 hen when we subtract 82 - 28 we obtain 54 which is the combination we where trying to find.

Notice as well, that as we go down the list, the differences between reversed digit number and original become smaller (and ends being zero for the number 55), so they do not satisfy the requirement.

Therefore 28 is the answer, since 82 (the new number formed when the digits are reversed) exceeds the original number by 54.

8 0
3 years ago
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Please help? Thank you!
Zarrin [17]
The statements that are true are A, B, and D
7 0
4 years ago
Can someone please help super short
insens350 [35]

Answer:

542, 543, 544, 545.

Step-by-step explanation:

Divide 2174 by 4 = 543.5  

(because there are 4 integers) 543.5 is not an integer.

However, one of the four integers is 543.

Write down four consecutive numbers that include 543 and add them:  

like 541+542+543+544 =. if that is 2174, you have the answer, if it's too low, try moving up one number, like

542+543+544+545 = if it's still too low, move up one number again  

543+544+545+546=  

You only have to do that a max of 3 times to get the answer.

The four consecutive integers are  

542, 543, 544, 545.

<em>good luck, hope this helps :)</em>

3 0
3 years ago
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Find the volume of a cylinder with a radius of 4 inches and a height that is three times the radius. Use 3.14 for pi and round y
motikmotik

Answer:

<u>603.19</u><u> </u>with pi and <u>602.88</u> with 3.14

Step-by-step explanation:

V = pi times r^2 times h

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3 years ago
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