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soldier1979 [14.2K]

1 year ago

6

Help me I’m not sure how to do this

1 answer:

maw [93]1 year ago

6 0

Answer:

_______

Step-by-step explanation:

i cant read that sorry :|

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Is 25.9578 a irrational

ICE Princess25 [194]

You mean is it an irrational number?

No, it's not!
An irrational number is a number that canNOT be expressed as a fraction, and this number can be easily represented as a fraction: such as this one:
$\frac{259578}{10000}$

8 0

3 years ago

What does x = ?<br> If you can't see the numbers I can type them

nikitadnepr [17]

So you know that:

2x+y=14+y
and
5x-y=x+13y

Here you have two equations with two unknown variables:
If you isolate x from the second equations you get:
x=(7/2)y
Insert that in the first equations and solve for y:
2*(7/2)y+y=14+y
y=2

Insert that value for y in one of the two equations (i chose the first):
2x+2=14+2
x=7

Therefore x=7

Hope that helped.

Actually you could start with isolating x, and then insert that in one of the two equations.

7 0

2 years ago

The area of a rectangle is 336 square inches. If the width of a rectangle is 6 inches. What is the length of the rectangle?

Hoochie [10]

The length of the rectangle is 56

6 0

3 years ago

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What are the orders pairs for this figure

quester [9]

A is (2,-4) B (-2,5) C (0,-6) D(-4,-3) E(3,0) F(5,4)

7 0

3 years ago

A sphere and a cylinder have the same radius and height. The volume of the cylinder is 21m. what is the volume of the sphere.

Goshia [24]

Answer:

The volume of the sphere is 14m³

Step-by-step explanation:

Given

Volume of the cylinder = $21m^3$

Required

Volume of the sphere

Given that the volume of the cylinder is 21, the first step is to solve for the radius of the cylinder;

<em>Using the volume formula of a cylinder</em>

The formula goes thus

$V = \pi r^2h$

Substitute 21 for V; this gives

$21 = \pi r^2h$

Divide both sides by h

$\frac{21}{h} = \frac{\pi r^2h}{h}$

$\frac{21}{h} = \pi r^2$

The next step is to solve for the volume of the sphere using the following formula;

$V = \frac{4}{3}\pi r^3$

Divide both sides by r

$\frac{V}{r} = \frac{4}{3r}\pi r^3$

Expand Expression

$\frac{V}{r} = \frac{4}{3}\pi r^2$

Substitute $\frac{21}{h} = \pi r^2$

$\frac{V}{r} = \frac{4}{3} * \frac{21}{h}$

$\frac{V}{r} = \frac{84}{3h}$

$\frac{V}{r} = \frac{28}{h}$

Multiply both sided by r

$r * \frac{V}{r} = \frac{28}{h} * r$

$V = \frac{28r}{h}$ ------ equation 1

From the question, we were given that the height of the cylinder and the sphere have equal value;

This implies that the height of the cylinder equals the diameter of the sphere. In other words

$h = D$ , where D represents diameter of the sphere

Recall that $D = 2r$

So, $h = D = 2r$

$h = 2r$

Substitute 2r for h in equation 1

$V = \frac{28r}{2r}$

$V = \frac{28}{2}$

$V = 14$

Hence, the volume of the sphere is 14m³

4 0

3 years ago

Read 2 more answers