Ask question

Ask question

All categories

sergeinik [125]

3 years ago

5

The eqaution d=m/v can be used to calculate the density d an object with a mass and volume v. Which is an equivalent equation so

lved for v

2 answers:

kodGreya [7K]3 years ago

8 0

v = $\frac{m}{d}$

given d = $\frac{m}{v}$

multiply both sides of the equation by v, hence

dv = m ( divide both sides by d )

v = $\frac{m}{d}$

valkas [14]3 years ago

8 0

Answer:

m/d=v on edg. 2020

You might be interested in

1 point) As reported in "Runner's World" magazine, the times of the finishers in the New York City 10 km run are normally distri

BigorU [14]

Answer:

(a) E (X) = 61 and SD (X) = 9

(b) E (Z) = 0 and SD (Z) = 1

Step-by-step explanation:

The time of the finishers in the New York City 10 km run are normally distributed with a mean,<em>μ</em> = 61 minutes and a standard deviation, <em>σ</em> = 9 minutes.

(a)

The random variable <em>X</em> is defined as the finishing time for the finishers.

Then the expected value of <em>X</em> is:

<em>E </em>(<em>X</em>) = 61 minutes

The variance of the random variable <em>X</em> is:

<em>V</em> (<em>X</em>) = (9 minutes)²

Then the standard deviation of the random variable <em>X</em> is:

<em>SD</em> (<em>X</em>) = 9 minutes

(b)

The random variable <em>Z</em> is the standardized form of the random variable <em>X</em>.

It is defined as: $Z=\frac{X-\mu}{\sigma}$

Compute the expected value of <em>Z</em> as follows:

$E(Z)=E[\frac{X-\mu}{\sigma}]\\=\frac{E(X)-\mu}{\sigma}\\=\frac{61-61}{9}\\=0$

The mean of <em>Z</em> is 0.

Compute the variance of <em>Z</em> as follows:

$V(Z)=V[\frac{X-\mu}{\sigma}]\\=\frac{V(X)+V(\mu)}{\sigma^{2}}\\=\frac{V(X)}{\sigma^{2}}\\=\frac{9^{2}}{9^{2}}\\=1$

The variance of <em>Z</em> is 1.

So the standard deviation is 1.

8 0

3 years ago

Create an expression that you would use to solve the problem below.

masya89 [10]

The tool was used for 28 minutes

Step-by-step explanation:

We will use simple division to calculate the number for minutes for which the tool was rented

Given

Cost per minute = $0.65

Total cost = $18.20

Let x be the number of minutes

So,

x = $\frac{Total\ cost}{Cost\ per\ minute}\\= \frac{18.20}{0.65}\\=28\ minutes$

The tool was used for 28 minutes

Keywords: Division, Linear equation

Learn more about division at:

#LearnwithBrainly

7 0

3 years ago

Read 2 more answers

Consider the line y = 3/8x + 3

Finger [1]

Answer:

Perpendicular line y = (- 8/3)x - 76/3.

Parallel line y = (3/8)x - 1

Step-by-step explanation:

y = 3/8

x + 3

1) Perpendicular line has negative reciprocal slope.

m = - 8/3

y = (- 8/3)x + b

Point (-8, - 4)

- 4 = (- 8/3)*(-8) + b

-4 - 64/3 = b

b = - 76/3

y = (- 8/3)x - 76/3

2) Parallel line has the same slope.

m = 3/8

y = (3/8)x + b

Point (-8, -4)

- 4 = (3/8)*(- 8) + b

- 4 + 3 = b

b = - 1

y = (3/8)x - 1

6 0

3 years ago

certain electronics manufacturer found that the marginal cost C to produce x DVD/Blu- ray players can be found using the equatio

AleksAgata [21]

Answer:

242.

Step-by-step explanation:

C = 0.03 x 2 − 8 x + 700

When the marginal cost = $522 we have:

522 = 0.03 x 2 − 8 x + 700

0.03x^2 - 8x + 700 - 522 = 0

0.03x^2 - 8x + 178 = 0

Using the quadratic formula:

x = [ -(-8) +/- sqrt( 64 - 4 * 0.03 * 178)] / 0.06

= 8 +/- sqrt42.64 / 0.06

= 242 players.

8 0

3 years ago

Decrease <br> 489.8<br> by 82%

Delicious77 [7]

Answer:

88.164

Step-by-step explanation:

First you find 82 percent of 489.8 and to do the we do

489.8 times .82

which equals 401.636

now we decrease 489.8 by 401.636

489.8 minus 401.636 equals

88.164

3 0

3 years ago

Read 2 more answers