1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kodGreya [7K]
3 years ago
6

Does 3.2 - 4d=2.3d+3 no solution or identity

Mathematics
2 answers:
Fynjy0 [20]3 years ago
7 0
D=0.04286 is the answer
Setler79 [48]3 years ago
4 0
This equation does have a solution and it is 0.03174603
You might be interested in
The CEO of a large manufacturing company is curious if there is a difference in productivity level of her warehouse employees ba
blsea [12.9K]

Answer:

The test statistic is z = -2.11.

Step-by-step explanation:

Before finding the test statistic, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Group 1: Sample of 35, mean of 1276, standard deviation of 347.

This means that:

\mu_1 = 1276, s_1 = \frac{347}{\sqrt{35}} = 58.6537

Group 2: Sample of 35, mean of 1439, standard deviation of 298.

This means that:

\mu_2 = 1439, s_2 = \frac{298}{\sqrt{35}} = 50.3712

Test if there is a difference in productivity level.

At the null hypothesis, we test that there is no difference, that is, the subtraction is 0. So

H_0: \mu_1 - \mu_2 = 0

At the alternate hypothesis, we test that there is difference, that is, the subtraction is different of 0. So

H_1: \mu_1 - \mu_2 \neq 0

The test statistic is:

z = \frac{X - \mu}{s}

In which X is the sample mean, \mu is the value tested at the null hypothesis and s is the standard error.

0 is tested at the null hypothesis:

This means that \mu = 0

From the two samples:

X = \mu_1 - \mu_2 = 1276 - 1439 = -163

s = \sqrt{s_1^2+s_2^2} = \sqrt{58.6537^2+50.3712^2} = 77.3144

Test statistic:

z = \frac{X - \mu}{s}

z = \frac{-163 - 0}{77.3144}

z = -2.11

The test statistic is z = -2.11.

7 0
3 years ago
The Rayhills are buying new windows for their house. The company installs the new windows for $2,800. The total cost for buying
BigorU [14]

Answer:16

Step-by-step explanation:6484.00-2800 for installation ends up equaling $3684.00

The you divide that answer by $230.25

That equals 16:The answer is 16 windows

6 0
3 years ago
Solve Systems by Substitution<br> 2x+5y=-3<br> x+8y=4<br> and<br> 2x+y=7<br> x-2y=-14
ASHA 777 [7]
2x + 5y = -3 ⇒ 2x +   5y = -3 
1x + 8y =  4 ⇒ <u>2x + 16y = 8
</u>                               -<u>11y</u> = <u>-11 </u>
                                -11     -11
                                    y = 1
                        2x + 5(1) = -3
                            2x + 5 = -3
                            <u>      -5     -5</u>
                                  <u>2x</u> = <u>-8</u>
                                   2      2
                                    x = -4
                              (x, y) = (-4, 1)

2x + 1y = 7     ⇒ 2x + 1y = 7
1x -  2y = -14 ⇒ <u>2x  - 4y  = -28</u>
                                   <u>5y</u> = <u>35</u>
                                    5      5
                                     y = 7
                             2x + 7 = 7
                             <u>      -7   -7</u>
                                   <u>2x</u> = <u>0</u>
                                    2     2
                                    x = 0
                              (x, y) = (0, 7)
4 0
3 years ago
45 points! Help me on the attached file, please :D
atroni [7]
It is B.Scale factor=New length/old length=8/2=4
8 0
3 years ago
Write two numbers that multiply to −33 and add to 8
cupoosta [38]

Answer:

-3 and 11

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • The lengths in feet of three pieces of timber are 48, 72, and 40. The sawmill operator needs to cut the timber into logs of equa
    7·1 answer
  • 1. It takes Planet Netflix 24 hours to complete a full rotation. It takes Planet Hulu approximately 72 days, 16 hours, and 30 mi
    10·2 answers
  • Gracie can purchase 5 oranges for $4 but she only wants one what is the cost of one orange
    9·1 answer
  • Lris has a family photograph with a width of8 in and a height of10 in. she wants to enlarge the photograph so that its width is
    15·1 answer
  • How is the expression (3 + y) ⋅ 7 described by its factors and terms?
    6·2 answers
  • Isolate the variable x. - 5x &lt; 10
    13·1 answer
  • Given the equation below, if x = 4, what is the value of y? y=14x
    6·1 answer
  • I’m lost in my train of thought May someone please help please and thank you:)
    14·1 answer
  • SOMEONE ANSWER HURRY PLEASE
    5·1 answer
  • Volume with cubes help pls 2
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!