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3 years ago

Which of these is a simplified form of the equation 8y + 4 = 6 + 2y + 1y?

2 answers:

3 0

The first one would be the right one!

you just take all the y one side and the numbers on one side
so 8y+4= 6+3y

now 8y-3y= 6-4

therefore 5y = 2

!!

Lena [83]3 years ago

3 0

So, with this I'm pretty sure you have to get all variables and all normal numbers on the same sides SO if 8y+4=6+2y+1y, then you must get the 4 over to 6 so then the equation would be, 8y=-4+6+2y+1y and the 2y and 1y (or 3y) must change to the other side so then it would be 8y-3y=-4+6. Then you just simplify to 5y=2. Therefore, your answer is A.

Steps
8y+4=6+2y+1y
8y=-4+6+2y+1y
8y-3y=-4+6
∴ 5y=2

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2 years ago

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Oksanka [162]

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2 years ago

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Jet001 [13]

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80.0456< $\bar x$ <81.1210

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$\bar x\pm z\times \frac{\sigma}{\sqrt{n}}$

#We substitute our values in the formula to solve for CI:

$=\bar x\pm z\times \frac{\sigma}{\sqrt{n}}\\\\=\bar y\pm z_{0.05}\times \frac{s}{\sqrt{72}}\\\\=80.5833\pm 1.645\times \frac{2.77369}{\sqrt{72}}\\\\=80.5833\pm0.5377\\\\=[80.0456,81.1210]$

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