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Verdich [7]
4 years ago
14

Identify the methods PLEASE HELP!!

Mathematics
2 answers:
Nostrana [21]4 years ago
8 0

Answer:

C and D

Step-by-step explanation:

You need to add the 2 equations together, so one equation must be negative and the other positive. You also need to make sure the coefficients to the variables are the same so you can eliminate them. Therefore, A and B are wrong and your correct choices are C and D.

klemol [59]4 years ago
6 0

Answer:

Letter A and B are the answers

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vazorg [7]

Answer:

The value of r=\frac{-106}{47}

The value of x=\frac{83}{32}

Step-by-step explanation:

Given that,

A) \frac{2r-2}{7r+10} = \frac{9}{8}

Now,

\frac{2r-2}{7r+10} = \frac{9}{8}

8(2r-2)=9(7r+10)

16r-16=63r+90

-16-90=63r-16r

-(16+90)=47r

-106=47r

r=\frac{-106}{47}

B) \frac{x+4}{9} = \frac{3(x-2)-1}{5}

Now,

\frac{x+4}{9} = \frac{3(x-2)-1}{5}

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5x+25=9[3x-6-1]

5x+25=9[3x-7]

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25+63=27x+5x

83=32x

x=\frac{83}{32}

6 0
4 years ago
Please help!!!!
DochEvi [55]

Answer:

256h28k8

Step-by-step explanation:

6 0
3 years ago
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Levart [38]

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Step-by-step explanation:

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1. Cooking oil is sold in two sizes of cans.
iren2701 [21]

Answer:

Small can

Step-by-step explanation:

Price per liter for Small can = 2.20 /4 = 0.55

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4 0
3 years ago
What does ∑11n=1(98−2n) equal?<br><br> Plz Help
Rasek [7]

Answer:n1-11

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Step-by-step I'm a retired math teacher so I know.

6 0
4 years ago
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