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iren [92.7K]
2 years ago
9

Help will mark brainiest

Mathematics
2 answers:
Ivanshal [37]2 years ago
6 0

So first Isolate the variable by dividing each side by factors that don't contain the variable.

y= 3x/2 + 3

Hope this helps!

Alex_Xolod [135]2 years ago
5 0

Here is the equation given:

-6x=12-4y

In the equation, you're looking for y. That means you need to move anything with the variable y to the other side.

In this equation, you have 12-4y. To move 12 to the other side, you will need to subtract 12 on both sides. This is because when a variable or integer is moved, the sign changes. The 12 was originally positive, but when moving it, it will become -12, which is why it was subtracted.

-6x-12=12-4y-12 \\-6x-12=-4y

Remember you're looking for y alone. y is currently -4y. To remove the -4 that is being multiplied by y, you will need to do the opposite of it, which is divide by -4. Divide both sides by -4:

\frac{-6x-12}{-4} =\frac{-4y}{-4}

When a negative number is multiplied by another negative number, the sign becomes positive. On the left side, you have -6x-12, which is being divided by -4. When you divide, \frac{-6x}{-4} becomes \frac{6}{4}.

\frac{-6x-12}{-4} =\frac{-4y}{-4}\\\frac{6}{4}x+3=y

\frac{6}{4} cans till be simplified. The greatest common factor of 6 and 4 is 2, so divide the fraction by 2.

\frac{6 \div 2}{4 \div 2} =\frac{3}{2}

That means \frac{3}{2}x+3=y

The answer you are looking is \bf \frac{3}{2}.

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Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th
coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}

In this question, we have that:

\sigma = 51.02, M = 2, Z = 1.96

So

Z = \frac{M\sqrt{n}}{\sigma}

1.96 = \frac{2\sqrt{n}}{51.02}

2\sqrt{n} = 51.02*1.96

\sqrt{n} = \frac{51.02*1.96}{2}

(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2

n = 2500

The sample size required is 2500.

3 0
3 years ago
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ikadub [295]

Answer:

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3 0
3 years ago
I will make you Brainliest
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Answer and Step-by-step explanation:

Greetings!

I'm~Isabelle~Williams~and~will~be~answering~your~question!

For~the~first~question~the~answer~is~option~number~``4"

x\geq -1

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Shane went bowling with his friends. The bowling alley charges $20 for an hour of group bowling plus a fee to rent each pair of
ValentinkaMS [17]

Answer:

4x+20=31

Step-by-step explanation:

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2 years ago
WILL GIVE BRAINLIEST!!!
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The answer is B: moderate
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