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3 years ago

8

How much water will the swimming pool hold if it is completely filled with water?

1 answer:

lara31 [8.8K]3 years ago

6 0

Answer:

144

Step-by-step explanation:

You should pick B.

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Almost of the mass of the human body is made up of just six elements.

Vesnalui [34]

Answer:

Step-by-step explanation:

To solve each of these all you have to do is multiply 60kg which is the whole mass of a human body times the percentage so..

Oxygen = (0.65)(60) = 39kg

Carbon = (0.18)(60) = 10.8kg

Hydrogen = (0.10)(60) = 6

Nitrogen = (0.03)(60) = 1.8kg

Calcium = (0.015)(60) = 0.9kg

Phosphorus = (0.01)(60) = 0.6kg

These numbers dont exactly add up to 60 because the percentages gives dont add up to 100%, but this is how to do it.

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3 years ago

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VMariaS [17]

Answer:

18.8

Step-by-step explanation:

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3 years ago

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Brrunno [24]

Just do 2000-586.40 and that will get you the remaining money they need to raise!:)

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3 years ago

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WILL GIVE BRAINLIEST PLEASE ANSWER

Anestetic [448]

Answer:B is correct one

Step-by-step explanation:

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3 years ago

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Find the set of values of k for which the line y=kx-4 intersects the curve y=x²-2x at 2 distinct points?

Sonbull [250]

Answer:

$-6 < k < 2$

Step-by-step explanation:

Given

$y = x^2 - 2x$

$y =kx -4$

Required

Possible values of k

The general quadratic equation is:

$ax^2 + bx + c = 0$

Subtract $y = x^2 - 2x$ and $y =kx -4$

$y - y = x^2 - 2x - kx +4$

$0 = x^2 - 2x - kx +4$

Factorize:

$0 = x^2 +x(-2 - k) +4$

Rewrite as:

$x^2 +x(-2 - k) +4=0$

Compare the above equation to: $ax^2 + bx + c = 0$

$a = 1$

$b= -2-k$

$c =4$

For the equation to have two distinct solution, the following must be true:

$b^2 - 4ac > 0$

So, we have:

$(-2-k)^2 -4*1*4>0$

$(-2-k)^2 -16>0$

Expand

$4 +4k+k^2-16>0$

Rewrite as:

$k^2 + 4k - 16 + 4 >0$

$k^2 + 4k - 12 >0$

Expand

$k^2 + 6k-2k - 12 >0$

Factorize

$k(k + 6)-2(k + 6) >0$

Factor out k + 6

$(k -2)(k + 6) >0$

Split:

$k -2 > 0$ or $k + 6> 0$

So:

$k > 2$ or k $> -6$

To make the above inequality true, we set:

$k < 2$ or $k >-6$

So, the set of values of k is:

$-6 < k < 2$

3 0

3 years ago