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Whitepunk [10]
3 years ago
7

If x= 3 and y = 7 evaluate the following expression: 20 - (3y - 4x)

Mathematics
2 answers:
slavikrds [6]3 years ago
8 0

Answer:

17

Step-by-step explanation:

3x3=9    4x7=28   28+9=37   37-20=17

vladimir1956 [14]3 years ago
4 0

Answer:

11

Step-by-step explanation:

20-(3y-4x)

replace the variables

20-(3*7-4*3)

multiply

20-(21-12)

subtract

20-(9)

20-9

answer=11

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Semenov [28]

Answer:

The answer is B. 38.25

Step-by-step explanation:

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8 0
3 years ago
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Use addition or substitution to find the value of y for this set of equations. 4x + 13y = 40 4x + 3y = -40
Aliun [14]
4x + 13y = 40
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multiply second equation by -1

4x + 13y = 40
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add equations together

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put y in either original equation

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5 0
3 years ago
Can someone please help with this i don’t know that answer and I want to pass
Nataliya [291]

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Step-by-step explanation:

We add the two fraction first to determine the total ratio

¹/4 + ²/3 = ¹¹/12

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Therefore;

¼ : ¹¹/12

How How much grape juice does Sarah use for each full cup of water, i.e ¹²/12

? (x) : ¹²/12

We cross multiply the ratios;

¹²/12 * ¼ = ¹¹/12 * x

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5 0
3 years ago
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lesya [120]

Answer: -14.2 hoped this help kiddo

Step-by-step explanation:

5 0
3 years ago
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stealth61 [152]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
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