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Archy [21]
2 years ago
15

13. Solve 5x - 7 = 5 - x using algebraic operations. Check your solution using a

Mathematics
1 answer:
11Alexandr11 [23.1K]2 years ago
6 0

Answer:

x=2

Step-by-step explanation:

5x-7=5-x

6x-7=5

6x=12

x=2

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The lengths of the diagonals of rectangle ABCD intersect at E. If AE =x+4 and CE= 3x-12. What is the length of BD?
swat32

Answer:

DB = 24

Step-by-step explanation:

First, note that the diagonals of a rectangle are equal and bisect each other. In other words, DB = CA and CE = EA and DE = BE.

Also, AE + CE = CA

So, using this, we can write this equation:

AE = CE

x + 4 = 3x -12

Subtract 4 from both sides.

x = 3x -16

Subtract 3x from both sides.

-2x = -16

Divide both sides by -2

x = 8

Then, substitute this into AE + CE = CA

x + 4 + 3x - 12 =

8 + 4 + 24 - 12 = 24

Then, because CA = DB,

DB = 24

I hope this helps! Feel free to ask any questions! :)

5 0
3 years ago
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A ratio is comparing one thing to another (numbers in this case). You can write ratios in many ways
here’s three different ways.
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4:2
4 to 2
4/2

*THE RATIO MUST ALWAYS BE IN ORDER!!! If boys come first in the problem WRITE THE BOYS NUMBER FIRST! If girls come first, WRITE THE GIRLS FIRST IN THE RATIO!!! (That’s a very common mistake) hope this helps!
6 0
3 years ago
Find x and y in <br>2x+2y=12<br>4x_4y=13
dlinn [17]
For the first one the answer is y=-1x+6 which means x=-1 and y=6
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3 years ago
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Peter drive 320 miles in 8 hours . calculate his average speed .
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Answer: 40

Step-by-step explanation:

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The answer is 1e + 13 i think
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