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4 years ago

11

What is -4x=-2+4y -4y=1-4x

1 answer:

pickupchik [31]4 years ago

5 0

I hope this helps you

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Please help me!!!!!!!!!!

kirill [66]

I think the answer may be D. You can graph the points and draw a line through the points to see what other points are intersected by the line.

5 0

3 years ago

A closed, rectangular-faced box with a square base is to be constructed using only 36 m2 of material. What should the height h a

kkurt [141]

Answer:

$b=h=\sqrt{6}$ m

Step-by-step explanation:

Let

Bas length of box=b

Height of box=h

Material used in constructing of box=36 square m

We have to find the height h and base length b of the box to maximize the volume of box.

Surface area of box= $2b^2+4bh$

$2b^2+4bh=36$

$b^2+2bh=18$

$2bh=18-b^2$

$h=\frac{18-b^2}{2b}$

Volume of box, V= $b^2h$

Substitute the values

$V=b^2\times \frac{18-b^2}{2b}$

$V=\frac{1}{2}(18b-b^3)$

Differentiate w. r.t b

$\frac{dV}{db}=\frac{1}{2}(18-3b^2)$

$\frac{dV}{db}=0$

$\frac{1}{2}(18-3b^2)=0$

$\implies 18-3b^2=0$

$\implies 3b^2=18$

$b^2=6$

$b=\pm \sqrt{6}$

$b=\sqrt{6}$

The negative value of b is not possible because length cannot be negative.

Again differentiate w.r.t b

$\frac{d^2V}{db^2}=-3b$

At $b=\sqrt{6}$

$\frac{d^2V}{db^2}=-3\sqrt{6}$

Hence, the volume of box is maximum at $b=\sqrt{6}$ .

$h=\frac{18-(\sqrt{6})^2}{2\sqrt{6}}$

$h=\frac{18-6}{2\sqrt{6}}$

$h=\frac{12}{2\sqrt{6}}$

$h=\sqrt{6}$

$b=h=\sqrt{6}$ m

7 0

3 years ago

15+8x=5y answer please

alexira [117]

15+8x+5y
8x+5y-15
x+5/8y-15/8

There is no solution

3 0

3 years ago

Read 2 more answers

Solve for X: 1/3 (2x - 8)=4.

Veseljchak [2.6K]

Answer:

x = 10

Step-by-step explanation:

1/3 (2x - 8)=4.

Multiply each side by 3

1/3 *3(2x - 8)=4.*3

2x-8 = 12

Add 8 to each side

2x-8+8 =12+8

2x = 20

Divide each side by 2

2x/2= 20/2

x = 10

5 0

3 years ago

Read 2 more answers

Which ratio forms a proportion with 14/42?<br> 1/4<br><br> 7/21<br><br> 12/40<br><br> 28/80

MA_775_DIABLO [31]

Answer: <span>7/21

7 * 2 = 14
21 * 2 = 42

</span>

8 0

3 years ago

Read 2 more answers