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
OleMash [197]
3 years ago
11

6.2x =-6 solve the equation

Mathematics
2 answers:
mestny [16]3 years ago
6 0
6.2x = -6
Divide both sides by 6.2
x= -6/6.2
x= -0.968
Karo-lina-s [1.5K]3 years ago
4 0
-1.03 repeating is what i get
You might be interested in
An auto company claims that the fuel efficiency of its sedan has been substantially improved. A consumer advocate organization w
zzz [600]

Answer:

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{0.983 -0}{\frac{1.685}{\sqrt{12}}}=2.021

df=n-1=12-1=11

p_v =P(t_{(11)}>2.021) =0.0342

If we compare the the p value with the significance level provided \alpha=0.1, we see that p_v < \alpha, so then we can reject the null hypothesis. and there is a significant increase in the miles per gallon from 2017 to 2019 at 10% of significance.

Step-by-step explanation:

Previous concepts

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations (This problem) we can use it.  

Let put some notation :

x=test value 2017 , y = test value 2019

x: 28.7 32.1 29.6 30.5 31.9 30.9 32.3 33.1 29.6 30.8 31.1 31.6

y: 31.1 32.4 31.3 33.5 31.7 32.0 31.8 29.9 31.0 32.8 32.7 33.8

Solution to the problem

The system of hypothesis for this case are:

Null hypothesis: \mu_y- \mu_x \leq 0

Alternative hypothesis: \mu_y -\mu_x >0

Because if we have an improvement we expect that the values for 2019 would be higher compared with the values for 2017

The first step is calculate the difference d_i=y_i-x_i and we obtain this:

d: 2.4, 0.3, 1.7,3,-0.2, 1.1, -0.5, -3.2, 1.4, 2, 1.6, 2.2

The second step is calculate the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{11.8}{12}=0.983

The third step would be calculate the standard deviation for the differences, and we got:

s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =1.685

We assume that the true difference follows a normal distribution. The 4th step is calculate the statistic given by :

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{0.983 -0}{\frac{1.685}{\sqrt{12}}}=2.021

The next step is calculate the degrees of freedom given by:

df=n-1=12-1=11

Now we can calculate the p value, since we have a right tailed test the p value is given by:

p_v =P(t_{(11)}>2.021) =0.0342

If we compare the the p value with the significance level provided \alpha=0.1, we see that p_v < \alpha, so then we can reject the null hypothesis. and there is a significant increase in the miles per gallon from 2017 to 2019 at 10% of significance.

4 0
2 years ago
What are two pair fractions with common denominators for 3/5 and 3/4
diamong [38]
The cheap answer is, you simply "grab the denominator of one and multiply it times the other's top and bottom", so let's do so,

\bf \cfrac{3}{5}\cdot \cfrac{4}{4}\implies \cfrac{12}{20}\qquad \qquad \qquad \qquad \qquad \cfrac{3}{4}\cdot \cfrac{5}{5}\implies \cfrac{15}{20}
6 0
3 years ago
For any two integers x and y, l x + y l = l x | + l y l<br><br> true or false?
melomori [17]
True because of the absolute value bars
7 0
2 years ago
What is the volume of the right rectangular prism?
Zepler [3.9K]

Answer:

Volume = 308cm^{3}

Step-by-step explanation:

Volume of a rectangular prism = Height * Width * Depth

Sub in the three values and solve

V = 11 * 7 * 4

V = 308cm^{3}

8 0
3 years ago
A crafts store investigates the sales of paintings. It records the category of painting and whether it is in a frame or on a can
worty [1.4K]

Answer:

4/11

Step-by-step explanation:

I got the question wrong and it told me the right answer.

6 0
2 years ago
Other questions:
  • A business has a netloss of $419.18 Does that mean the breakeven is 419.18??
    5·2 answers
  • Tell of 100 trays of 100 cookies is greater than, less than, or equal to 1,000?
    15·1 answer
  • The product of a number four is at most negative 10
    11·1 answer
  • Which of the following is equivalent to 16_3
    9·2 answers
  • What’s the circumference of a circle with radius of 18 in.
    5·1 answer
  • A piece of blue yarn is 6 2/10 yards long a piece of pink yarn is 7 times long as the blue yarn how much longer is the pink yarn
    6·1 answer
  • The perimeter of a square is 16 cm. Find the length of its diagonal.​
    6·2 answers
  • Please help me with this! I will give 25 points and Brainliest if it is correct!
    6·2 answers
  • Factor 4x^4+8x^2+1<br> PLZ try hurry ;-;.....anyone?
    5·1 answer
  • Can someone help me on this?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!