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3 years ago

Are these correct? If not what are the correct answers?

Mathematics

1 answer:

zaharov [31]3 years ago

5 0

Answer:

correct

Step-by-step explanation:

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Use distributive property to solve the problem 3 (9 - 10a) - 3a

Rudiy27

Answer:

27- 1 = 26

Step-by-step explanation:

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3 years ago

Work out the following questions

salantis [7]

Answer:

work out the following questions

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4 years ago

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Can someone please tutor me in math

ipn [44]

Wish I could but I am no good myself sorry

5 0

3 years ago

Could someone help me please?

Angelina_Jolie [31]

Answer:

600

Step-by-step explanation:

So lets rememer the formula for volume of a pyramid to sovle this:

LxHxW/3

Now lets plug in our values, for L, H, and W.

15x12x10/3

So, 15x12x10 is 1800. That is the height times the length times the width.

Now, since this isnt volume of a cube, we must divide the total my 3. This is how you find the volume of a pyramid, as I said above.

So it should be:

1800/3

600

This is your answer.

I hope this helps : )

Good luck!

8 0

3 years ago

Read 2 more answers

The manufacturer of a smart watch claims that individuals who pay attention to how many steps they take per day will inadvertent

drek231 [11]

Answer:

Hello your question is incomplete attached below is the complete question

answer : 1596 ± 2.861 $\sqrt{\frac{1580^2 }{20 } +\frac{2350^2 }{20 } }$ ------ ( A )

Step-by-step explanation:

I will use excel function to resolve this question

Determine the 99% confidence of interval for the difference in mean number of steps by all people

∝ = 0.01

critical value ( t ) = 2.861 ( = TINV ( 0.01, 19 )

Given that :

S1 = 1580

S2 = 2350

n1 = 20

n2 = 20

Difference in mean = x1 - x2 = 1596

Margin of Error = t * $\sqrt{\frac{S^2_{1} }{n_{1} } +\frac{s^2_{2} }{n_{2} } }$

∴ 99% confidence of interval

= 1596 ± 2.861 $\sqrt{\frac{1580^2 }{20 } +\frac{2350^2 }{20 } }$ ------

8 0

3 years ago