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MakcuM [25]
3 years ago
13

Suppose the first equation in a system of two linear equations is 12x + 7y = 25. The second equation being which of these will c

ause the system to have no solution?
A.
12x + 7y = 20
B.
12x + 7y = 25
C.
12x + 9y = 20
D.
12x + 9y = 25
Mathematics
1 answer:
Ratling [72]3 years ago
6 0

Answer:

A. 12x + 7y = 20

Step-by-step explanation:

Obviously, 12x + 7y cannot both be equivalent to unique [different] quantities.

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For each t-shirt sold, which I'll call <em>t</em>, 8th grade makes $15.

For each hat sold, which I'll call <em>h,</em> 8th grades makes $5.

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A: The equation to represent this situation is 15t+5h=900 because if 8th grade adds up all the profits from both hats and t-shirts, the goal is to make $900, so the total profit from shirts and hats should equal 900 dollars.

B: I'm just going to choose random numbers. Let's say nobody wanted to buy a hat from the 8th graders (h=0). You'd end up with

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Now let's say it was the other way around - nobody wanted to buy t-shirts

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h=180 - If they sold 0 t-shirts they'd have to sell 180 hats to raise $900

Finally let's say they sold 30 t-shirts

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3 years ago
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A

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slope= y2-y1/x2-x1

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y-y1 = m(x-x1)

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4 years ago
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Svet_ta [14]

Answer:

4 muffins is $2.75

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Step-by-step explanation:

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