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3 years ago

Please i really need help

Mathematics

1 answer:

Genrish500 [490]3 years ago

4 0

Answer:

-7, -6, -4, -2, 0, 2, 5, 7, 8, 9

Step-by-step explanation:

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Help plz Find y when x = 15 if y = 6 when x = 30

lutik1710 [3]

Answer:Y=3

Step-by-step explanation:

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2 years ago

a pyramid whose altitude is 5ft weighs 800lbs. at what distance from its vertex must it be cut by a plane parallel to its base s

slavikrds [6]

A structure which has a square base and four triangular sides meeting at a point is called pyramid.

At distance of 3.97 feet from its vertex , pyramid is cut by plane so that the two solids of equal weight will be formed.

<u>It is assumed that weight of pyramid is proportional to its volume.</u>

So, $w = k V$ , where V is volume of original pyramid and v is volume of small pyramid and k is constant.

Let us consider that at h distance, pyramid is cut from its vertex. So a small pyramid is also formed.

Assume that base area of original pyramid is A and base of small pyramid is a.

Volume of original pyramid is, $V= \frac{1}{3} *A* 5$

So, weight of original pyramid, $W = k *(\frac{1}{3} *A* 5) = 800$

Volume of small pyramid is, $v = \frac{1}{3}* a* h$

So, weight of small pyramid, $w = k*(\frac{1}{3}* a* h)=400$

<u>Since, base and height of small pyramid and original pyramid are in proportion.</u>

So, $\frac{a}{A} = (\frac{h}{5}) ^{2}$

$a = (\frac{h}{5} )^{2}A$

Substituting value of a in equation $k*(\frac{1}{3}* a* h)=400$

So, $k*(\frac{1}{3}* \frac{h^{2} }{25}A * h)=400$

$(k*\frac{1}{3}* A*5)*\frac{1}{5} *\frac{h^{2} }{25} * h)=400$

Since, $(k *\frac{1}{3} *A* 5) = 800$ , substitute in above equation.

So, $800*\frac{h^{3} }{125}=400\\\\h^{3}=\frac{125}{2}\\\\h=\sqrt[\frac{1}{3} ]{62.5}\\\\h=3.97 feet$

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2 years ago

Read 2 more answers

Bob buys eggs and potatoes at a store

Savatey [412]

Answer:

Each potato cost $4.67

Step-by-step explanation:

$25.92-$2.57=$23.35

$23.35/5 =$4.67

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2 years ago

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Find the slope of the line passing through the two points.

pogonyaev

Formula for slope: y2-y1/x2-x1
Plug in values.
3-8/-4-(-7)= -5/3 = slope
42-1/36-12=41/24=slope

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3 years ago

If you never pulled your money out of your account from the company in Question #4 and let it grow to age 60, how much money wou

Mariulka [41]

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2 years ago

Please i really need help​

Please i really need help