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murzikaleks [220]
3 years ago
8

Simplify 18 - 2[x + (x - 5)]. please i keep getting it wrong

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
8 0
18-2[x+(x-5)]
18-2[2x-5]
18-4x+10
28-4x
-7+x  or x-7  <-- Simplified version.
x=7      <-- What x equals.

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Plot the vertices (-2, -8), (-2, 2), and (8, 2).
charle [14.2K]

Answer:

  • (8, -8)
  • 100 square units

Step-by-step explanation:

The diagonals of a rectangle have the same midpoint, so for points A, B, C, D, we must have ...

  (A+C)/2 = (B+D)/2

  D = A + C - B

  D = (-2, -8) +(8, 2) -(-2, 2) = (-2+8+2, -8+2-2)

  D = (8, -8)

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The side lengths are 2-(-8) = 10, and 8-(-2) = 10. The area is the product of the side lengths, so is 10×10 = 100 square units.

_____

<em>Comment on side lengths</em>

When the end points of one side are on the same vertical line, the length of that side is the difference of y-coordinates. When the points lie on the same horizontal line, the side length is the difference of x-coordinates.

5 0
3 years ago
Read 2 more answers
What happens to the value of the expression <img src="https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7Bx%7D%20%2B5" id="TexFormula1" tit
Paraphin [41]

Answer:

A) increases

Step-by-step explanation:

5/x + 5

suppose x = 5; then 5/5 + 5 = 1 + 5 = 6

            x = 2; then    5/2 + 5 = 2.5 + 5 = 7.5

            x = 1 ;then 5/1 + 5 = 5 + 5 = 10

So when x value decreases from a large positive number to a small positive number, 5/x + 5 increases

3 0
2 years ago
Someone plz help me with this??????????!!!!!!!!!!
attashe74 [19]

Answer:

The answer is B.

Step-by-step explanation:

3 times 3 is 9. 2 times -6 is -12. 9 + -12 is -3.

9 times 3 is 27. 4 times -6 is -24. 27 + -24 is 3.

8 0
2 years ago
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FromTheMoon [43]

Answer:

Step-by-step explanation:

4 0
3 years ago
Explain step by step please!
adelina 88 [10]

Answer:

Each book weighs 2.5 pounds.

Step-by-step explanation:

75/2.5 is 30.  Or you could also get the answer by 30* 2.5 which it would be 75. So, therefor, the answer is 2.5.

5 0
2 years ago
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