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4 years ago

What is the mean of the following data set?

Mathematics

1 answer:

elixir [45]4 years ago

8 0

Step-by-step explanation:

You have to add all the numbers equals 160.

Then divide how many numbers there are. There are 20 numbers. Then, it is the sum divided by the count.

Hope this helps. Good Luck!

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5. Skylar got a manicure for $25. If she plans to tip 20%, how much is her tip?

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$5.00

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All we have to do is multiply 25 x 1/5 or 20%

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A cubed-shaped box has its side lengths decreased by 3 cm, when this happens, the volume decreases by 1385cm^3. What is the side

mixer [17]

Answer:

Step-by-step explanation:

let side of cube=x cm

volume=x³ cm³

again side=(x-3) cm

volume=(x-3)³ cm³

x³-(x-3)³=1385

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3(x^2+x²-3x+x²-6x+9)=1385

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9x²-27x+27-1385=0

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$x=\frac{27\pm\sqrt{(-27)^2-4*9*(-1358)} }{2*9} \\x=\frac{27\pm\sqrt{729+48888} }{18} \\or~x=\frac{27\pm\sqrt{49617} }{18} \\or~x=\frac{27\pm 222.749}{18} \\taking positive side only as negative sign gives negative length.\\or~x=\frac{27+222.749}{18} \\or~x\approx13.87$

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3 years ago