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valentina_108 [34]
3 years ago
12

10x + 9y=-15 -10x – 10y = 10 Solve by the elimination

Mathematics
1 answer:
jonny [76]3 years ago
8 0

Answer:

-y = 25

y = -25

When the signs are different you add, the value for x is the same so you don't need to do anythung else but to add

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Part B:
Andrew [12]

Articles of clothing that the store received last Thursday is 84

<u>Solution:</u>

Given that  

A clothing donation store received numerous articles of clothing on Thursday of last week.

The number of articles of clothing that the store received last Thursday is represented by the following expression:

4 (3x − 1) − 2 (6 + 2x)

Need to calculate articles of clothing that the store received last Thursday when x = 12.5

As on Thursday x = 12.5, need to substitute x = 12.5 in above equation to get number of articles received on Thursday.

On substituting x = 12.5, we get

4 ( (3 x 12.5 ) – 1 ) – 2 ( 6 + ( 2 x 12.5 ) )

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=> 146 – 62 = 84

On substituting x = 12.5 , we are getting value of expression as 84.

Hence articles of clothing that the store received last Thursday is 84

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Read 2 more answers
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