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vova2212 [387]
2 years ago
15

Expand and simplity-(x-5)-(2x+7)​

Mathematics
2 answers:
lana66690 [7]2 years ago
7 0

multiply by sign:-x+5-2x-7

collect like term:-x-2x+5-7

simplify:-3x-2

<h2>so finally the answer is -3x-2</h2>
Marina86 [1]2 years ago
4 0

Answer:

-3x - 2

Step-by-step explanation:

-(x - 5) ⇒ -x + 5

-(2x + 7) ⇒ -2x - 7

-x + 5 - 2x - 7 ⇒ -3x - 2

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sukhopar [10]
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4 0
3 years ago
How much more expensive is it, per pound, to buy ground beef at Store B than at Store A?
Ivahew [28]

Answer:

2.42

Step-by-step explanation:

First you need to use two points from store b to find the slope (y1-y2)/(x1-x2). I chose the first two points. (15.54-25.9)/(1.5-2.5)= 10.36. After you take another point from store b to plug into the equation y1-y2=m (x1-x2). M is the slope we just found and I used the first point.

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Y1-15.54=10.36x -15.54 get y1 by itself

Y=10.36x so store b is 10.36 a pound and store a is 7.94 a pound. 10.36-7.94= 2.42

7 0
2 years ago
Which of the following constants can be added to x2 + x to form a perfect square trinomial? a.1/9 b.4/9 c.4 1/9
xenn [34]
You can add 4/9. 

A simple trick is to look at the numerator and denominator separately, if they're both perfect squares then you're good (4, 2^2, check. 9, 3^2, check.)
8 0
3 years ago
If 3 - 3k-1 = 81, what is the value of k?
andreyandreev [35.5K]
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8 0
2 years ago
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Step-by-step explanation:

4 0
2 years ago
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