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azamat
3 years ago
9

What is 78,3 plus 21,7

Mathematics
1 answer:
Dima020 [189]3 years ago
4 0

100Answer:

Step-by-step explanation:

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The length of a rectangle is 8 feet longer than it is wideIf each side is increased 8 feet, then the area is multiplied by 2. Wh
Gemiola [76]

Answer:

W = 16

L = 24

Step-by-step explanation:

Let's write down the information we have first

"The length of a rectangle is 8 feet longer than it is wide"

L = W + 8

"If each side is increased 8 feet, then the area is multiplied by 2."

(L + 8)(W + 8) = 2LW

Now we can solve for W first, then L

(W + 16)(W + 8) = 2W(W + 8)

W² + 24W + 128 = 2W² + 16W

0 = W²- 8W - 128

0 = (W - 16)(W + 8)

W = 16

L = 24

(This part above is solved like quadratics)

4 0
3 years ago
The volume of the
DaniilM [7]

Answer:

<em>the answer is D</em>

Step-by-step explanation:

  • <em>to find the volume just multiply L x W</em>
  • <em>56.9 x 2.5 = 142.25</em>
  • <em>so the answer would be 142.25 cm</em>
3 0
4 years ago
URGENT DUE IN 20 MIN PLEASE HELP I WILL BE POSTING MORE QUESTIONS AFTER THIS SO PLEASE CHECK MY ACCT UR A GOD IF U HELP
Digiron [165]

Answer:

okay!

Step-by-step explanation:

7 0
3 years ago
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What is the answer to 2+2
Bingel [31]

Answer:

4

Step-by-step explanation:

2 + 2 = 4

5 0
3 years ago
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Two times the sum of nine and a number is the opposite of 9.<br> Write an equation and solve.
MrMuchimi
- - 2*-9x

This is because you have "two times" which is 2*

The sum of a number = x
 
Opposite of 9 = -9

8 0
4 years ago
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