All categories

2 years ago

Find the value of x when y = 8. X = ?

Mathematics

1 answer:

FrozenT [24]2 years ago

3 0

Answer:

Step-by-step explanation:

what is the function?

like y=3x?

or y=9x?

you gotta complete the question then i can answer it.

You might be interested in

Brainliest

Oduvanchick [21]

Answer:

Advantages of quantum mechanics include explaining phenomena found in nature as well as developing technologies that rely upon quantum effects, like lasers.

Step-by-step explanation:

Have a AWESOME day
-NaomiTheGenuis

7 0

2 years ago

A metal conduit will be used as a pathway for wiring through a concrete block. The conduit is a 5 foot long rod with an outer di

kolbaska11 [484]

Answer: 586.59 cubic centimeters .

Step-by-step explanation:

As per given . we have

Inner diameter = 1.8 inches

⇒Inner radius :r = 0.9 in. (radius is half of diameter)

= 0.9 x (2.54) = 2.286 cm [∵ 1 in . = 2.54 cm]

Outer diameter = 2 inches

⇒Outer radius : R = 1 inch = 2.54 cm

Height : h = 5 feet = 5 x(30.48) = 152.4 cm [∵ 1 foot = 30.48 cm]

The formula to find the volume of a hollow cylinder :

$V=\pi(R^2-r^2)h$ , where R= outer radius , r= inner radius and h= height.

Now , the volume of metal in the conduit :

$V=(3.14)(( 2.54)^2-(2.286)^2)(152.4)$

$V=(3.14)(6.4516-5.225796)(152.4)$

$V=(3.14)(1.225804)(152.4)$

$V=586.591342944\approx586.59\ cm^3$

Hence, the volume of metal in the conduit is 586.59 cubic centimeters .

5 0

3 years ago

A store is having a 20% off sale. If the reduced

FinnZ [79.3K]

Answer:

The original price of the item was $83

Step-by-step explanation:

5 0

3 years ago

Can someone help me with these questions and show work please and thank you

attashe74 [19]

Answer:

11. 78

12. 4x² - 3x - 1

Step-by-step explanation:

11. Sum of n whole numbers = ½(n² + n)

Multiply

½*n² + ½*n

= n²/2 + n/2

To find the sum of the first 12 whole number, substitute 12 for n into the equation.

= 12²/2 + 12/2

= 144/2 + 12/2

= 72 + 6

= 78

12. Area of trapezoid = ½(a + b)*h

Where,

a = 5x - 4

b = 3x + 2

h = x + 1

Area = ½(5x - 4 + 3x + 2)*(x + 1)

Area = ½(8x - 2)*(x + 1)

Area = ½[8x(x + 1) -2(x + 1)]

= ½[8x² + 8x - 2x - 2]

Add like terms

= ½(8x² - 6x - 2)

= ½(8x²) - ½(6x) - ½(2)

= 4x² - 3x - 1

6 0

3 years ago

You have 6L feet of fence to make a rectangular vegetable garden alongside the wall of your house, where L is a positive constan

nika2105 [10]

Answer:

A(max) = (9/2)*L² ft²

Dimensions:

x = 3*L feet

y = (3/2)*L ft

Step-by-step explanation:

Let call "x" and " y " sides of the rectangle. The side x is parallel to the wall of the house then

Area of the rectangle is

A(r) = x*y

And total length of fence available is 6*L f , and we will use the wall as one x side then, perimeter of the rectangle which is 2x + 2y becomes x + 2*y

Then

6*L = x + 2* y ⇒ y = ( 6*L - x ) /2

And the area as function of x is

A(x) = x* ( 6*L - x )/2

A(x) = ( 6*L*x - x² ) /2

Taking derivatives on both sides of the equation we get:

A´(x) = 1/2 ( 6*L - 2*x )

A´(x) = 0 ⇒ 1/2( 6*L - 2*x ) = 0

6*L - 2*x = 0

-2*x = - 6*L

x = 3*L feet

And

y = ( 6*L - x ) /2 ⇒ y = ( 6*L - 3*L )/ 2

y = ( 3/2)*L feet

And area maximum is:

A(max) = 3*L * 3/2*L

A(max) = (9/2)*L² f²

4 0

3 years ago

Read 2 more answers