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UNO [17]
3 years ago
12

If 3x2+3y2=42 and xy= -15, find the value of (x-y)2

Mathematics
2 answers:
Agata [3.3K]3 years ago
4 0
Was the other answer right?
salantis [7]3 years ago
3 0

Answer:

44

Step-by-step explanation:

x^2 + y^2 = 14

(x-y)^2  x^2 + y^2 - 2xy = 14 -2 * (-15) = 44

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3 years ago
Solve y = 4x + 12, using the x-values, 3, 5, and 8. Which of the following T-tables represents the ordered pairs?
SCORPION-xisa [38]
You plug in each of the 3 numbers as x so the table should have 3,5,8 as x and whatever you get for y for each one is your answer. I saw that you posted this 2 days ago, so you probably don't need help XD
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3 years ago
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Pleaseeeee help I’m begging someone I PROMISE. I will mark brainlest
Lerok [7]

Answer:


Step-by-step explanation:

a) x>0 → items can not be negative

b) c(2,000) = 5,000+1.3(2,000) = $7,600

c)5,000+1.3x<10,000

5,000-5,000+1.3x<10,000-5,000

1.3x<5,000

x<3846 items


5 0
4 years ago
Someone plz help me litterly no one would bother to help me so plz I beg of u due today
goldfiish [28.3K]

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>

Answer:

I'm going to help youuuuu.

Step-by-step explanation:

{1}

Your answer is A) because the rise/run is -2/4x, which simplifies to -1/2x, which is <em>option A)</em>.

{2}

Dario's salary is <em>B) $12 per hour</em>. This is because, in 5 hours, Dario makes 60 dollars. If you find the unit rate of $60 in 5 hours, the answer is $12 per hour.

{3}

A) Between <em>x = -6</em> and <em>x = -2</em>

I hope this helps! I am sorry if any of these are incorrect!

- sincerelynini

8 0
4 years ago
(X^2+6)(4x-3) how to solve this
In-s [12.5K]
<span>(X^2+6)(4x-3)
</span><span>=<span><span>(<span><span>x2</span>+6</span>)</span><span>(<span><span>4x</span>+<span>−3</span></span>)</span></span></span><span>=<span><span><span><span><span>(<span>x2</span>)</span><span>(<span>4x</span>)</span></span>+<span><span>(<span>x2</span>)</span><span>(<span>−3</span>)</span></span></span>+<span><span>(6)</span><span>(<span>4x</span>)</span></span></span>+<span><span>(6)</span><span>(<span>−3</span><span>)
</span></span></span></span></span>4x3−3x2+24x−18 is the answer
4 0
3 years ago
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