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Sidana [21]
3 years ago
13

Simplify the expression. -6(-9 + 5n) T Submit

Mathematics
1 answer:
Inessa [10]3 years ago
7 0

Answer:

54 + 30n     Can i get brainliest? :))

Step-by-step explanation:

distribute -6 with -9 and 5n

-6 * -9 = 54

-6 * 5n = -30n

54+30n (simplified)

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mina [271]
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Starting with the first one, we need to convert both of the equations into slope-intercept form. y = -2x + 5 is already in that form, now we just need to do it to 4x + 2y = 10.

2y = -4x + 10
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Since both equations give the same line, the first one has infinite solutions.

 Now onto the second one. Once again, the first step is to convert both of the equations into slope-intercept form. 

x = 26 - 3y becomes
3y = -x + 26
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2x + 6y = 22 becomes
6y = -2x + 22
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Now the third one. We do the same steps. 

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4y = -5x + 6
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Now the fourth one. We do the same steps again. 

x + 2y = 3 becomes
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4x + 8y = 15 becomes
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Once again, since these two lines have the same slopes, that means that they are parallel, meaning that this one has no solutions. 

Now the fifth one. 

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Last one!

x + 5y = 24 becomes
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y = -1/5x + 24/5

5x = 12 - y becomes
y = -5x +12

Since these equations are completely different, this system has a single solution. 
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