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2 years ago

Help meeeee pleaseeeee

Mathematics

2 answers:

kkurt [141]2 years ago

8 0

The third one
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Irina18 [472]2 years ago

3 0

The equation for this graph is y=(x+3)²-1

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So solve the following - 8 by 50 divided by 4 by 5

Vesna [10]

Answer:

Step-by-step explanation:

8*50=400 /4*5=20

400/20=20

5 0

3 years ago

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I need help with numbers six and seven of mu geometry homework !!!

alex41 [277]

6)1.yes 2. no 3. yes 4.yes
i have figured out seven yet ill get back to you

8 0

3 years ago

Please help if u know the answer to rhisn

iragen [17]

216 as 6x6x6=216 :))

7 0

3 years ago

a container with a square bottom, rectangular sides and no top is to e constructed to have a volume of 5 m^3. material for the b

VLD [36.1K]

Answer:

$2m\times 2m\times \frac{5}{4}m$

Step-by-step explanation:

We are given that a container with square bottom.

Let side of square=x

Height of container=h

Volume of container= $5m^3$

Cost of 1 square meter of material for the bottom=$10

Cost of 1 square meter of material for side=$8

We have to find the dimension of least expensive container.

Volume of container= $x^2h$

$x^2h=5$

$h=\frac{5}{x^2}$

Surface area of container= $x^2+2(x+x)h=x^2+4xh$

Cost= $C(x)=10x^2+8(4xh)=10x^2+32x(\frac{5}{x^2})=10x^2+\frac{160}{x}$

$C(x)=10x^2+\frac{160}{x}$

Differentiate w.r.t x

$\frac{dC}{dx}=20x-\frac{160}{x^2}$

$\frac{dC}{dx}=0$

$20x-\frac{160}{x^2}=0$

$\frac{160}{x^2}=20x$

$x^3=\frac{160}{20}=8$

$x=\sqrt[3]{8}=2$

Because side of container is always positive.

Again differentiate w.r.t x

$\frac{d^2C}{dx^2}=20+\frac{320}{x^3}$

Substitute x=2

$\frac{d^2C}{dx^2}=20+\frac{320}{2^3}=60>0$

Hence, the cost is minimum at x=2

Substitute the value of x

$h=\frac{5}{2^2}=\frac{5}{4}$ m

Hence, the dimensions of the least expensive container are

$2m\times 2m\times \frac{5}{4}m$

7 0

3 years ago

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Select all that apply.

nekit [7.7K]

Answer:

The individuals are observed the exact way they act in real life.

Step-by-step explanation:

There are two main types of studies in research; one is controlled or experimental and the other is observational.

In observational studies, the individuals participating in study are not manipulated or intervened or controlled in any way by the researcher.

Hence the statements best describes a characteristic of an observational study is the individuals are observed the exact way they act in real life !

4 0

3 years ago