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Anna007 [38]
3 years ago
15

What is 8x-4y=-12;-3,-1,1 solve for y

Mathematics
1 answer:
polet [3.4K]3 years ago
3 0
8x - 4y = -12
4y = 8x + 12
y = 8/4 x + 12/4
y = 2x + 3

When x = -3,
y = 2(-3) + 3 = -6 + 3 = -3
When x = -1,
y = 2(-1) + 3 = -2 + 3 = 1
When x = 1,
y = 2(1) + 3 = 2 + 3 = 5
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sp2606 [1]
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3 years ago
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Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!​
Svetlanka [38]

Answer:   a. 45 = k

                 b. d/t = 45

                 c. d = 45t

<u>Step-by-step explanation:</u>

The constant of proportionality (k) equals y divided by x if it is a direct variation.  In the given problem, y is represented by distance (d) and x is represented by time (t).

a)\quad \dfrac{d}{t}=k\\\\\\.\qquad \dfrac{90}{2}=k\\\\\\.\qquad 45=k\\\\\\b)\quad \dfrac{d}{t}=k\\\\\\.\ \quad \dfrac{d}{t}=45\\\\\\c)\quad \text{multiply both sides by t:}\\.\qquad d=45t

5 0
3 years ago
Brian, Chris, and Damien took a math test that had 20 questions. The number of questions Brian got right is 14 more than 1/4 the
Levart [38]
B = 1/4c + 14
d = 5/4c - 2
b = d

1/4c + 14 = 5/4c - 2 ....multiply by 4
c + 56 = 5c - 8
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16 = c <== Chris

b = 1/4c + 14.....b = 1/4(16) + 14.....b = 4 + 14....b = 18 <== Brian
d = 5/4c - 2....d = 5/4(16) - 2.....d = 20 - 2.....d = 18 <== Damien

solution : Brain and Damien answered 2 more questions correctly then Chris did. <===
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3 years ago
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Dafna11 [192]

Ask My question

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4 years ago
900 cm more or less or the same as 9000mm
sukhopar [10]
For this question you should know 1 cm is 10 mm so 900 cm is equal to 900 * 10 = 9000 mm and you can see that  they are same 
so the answer is 900cm is equal to 9000 mm :)))
i hope this is helpful
have a nice day 
8 0
3 years ago
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