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
Lostsunrise [7]
2 years ago
8

.

Mathematics
1 answer:
Maksim231197 [3]2 years ago
8 0

Answer:

D. x=1

Step-by-step explanation:

Image can be rewritten as 3x + 6 = 9.

Solve for x.

3x +6 = 9

Isolate x by subtracting 6 from both sides.

3x = 3

Get rid of the 3 by dividing by 3 on both sides.

x = 1

Hope this helped.

You might be interested in
The product of five and a number plus 10 is at least thirty
inna [77]

Answer: Greater of equal sign

Step-by-step explanation:

5+10+x is greater than or equal to 30 ( use the greater of equal to sign)

7 0
2 years ago
A study of the number of business lunches that executives in the insurance and banking industries claim as deductible expenses p
gizmo_the_mogwai [7]

Answer:

t=\frac{9.1-8}{\sqrt{\frac{(1.9)^2}{40}+\frac{(2.1)^2}{50}}}}=2.604  

p_v =2*P(t_{(88)}>2.604)=0.0108

So the p value is a very low value and using any significance level for given \alpha=0.05 always p_v so we can conclude that we have enough evidence to reject the null hypothesis, and there is enough evidence to conclude that the two means are significantly different at 5%

Step-by-step explanation:

Data given and notation

\bar X_{1}=9.1 represent the mean for the sample 1

\bar X_{2}=8 represent the mean for the sample 2

s_{1}=1.9 represent the sample standard deviation for the sample 1

s_{2}=2.1 represent the sample standard deviation for the sample 2

n_{1}=40 sample size for the group 1

n_{2}=50 sample size for the group 2

t would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the mean are different , the system of hypothesis would be:

Null hypothesis:\mu_{1} = \mu_{2}

Alternative hypothesis:\mu_{1} \neq \mu_{2}

If we analyze the size for the samples both are higher than 30 and the population deviations are not given, so for this case is better apply a t test to compare means, and the statistic is given by:

t=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{s^2_{1}}{n_{1}}+\frac{s^2_{2}}{n_{2}}}} (1)

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

We can replace in formula (1) the results obtained like this:

t=\frac{9.1-8}{\sqrt{\frac{(1.9)^2}{40}+\frac{(2.1)^2}{50}}}}=2.604  

Statistical decision

The first step is calculate the degrees of freedom, on this case:

df=n_{1}+n_{2}-2=40+50-2=88

Since is a bilateral test the p value would be:

p_v =2*P(t_{(88)}>2.604)=0.0108

So the p value is a very low value and using any significance level for given \alpha=0.05 always p_v so we can conclude that we have enough evidence to reject the null hypothesis, and there is enough evidence to conclude that the two means are significantly different at 5%

3 0
2 years ago
Guys I need help so pleaseeee I give brainliest
shusha [124]
The formula for tan is opposite/adjacent.

This being said, 12/13 would equal approximately 0.923077.

Hope this helps. ^^
5 0
2 years ago
A baker took 9 hours to bake 6 cakes how long does it take him to bake 1 cake?
AlexFokin [52]

Answer:

1.5 hours

Step-by-step explanation:

5 0
3 years ago
The image of a parabolic mirror is sketched on a graph. The image can be represented using the function y = x2 + 2, where x repr
Nadusha1986 [10]

Answer:

The image can be represented using the function y = x2 + 2, where x represents the horizontal distance from the maximum depth of the mirror and y represents the depth of the mirror as measured from the x-axis. How far ...

Step-by-step explanation:

The image can be represented using the function y = x2 + 2, where x represents the horizontal distance from the maximum depth of the mirror and y represents the depth of the mirror as measured from the x-axis. How far ...

3 0
3 years ago
Other questions:
  • The sum of two consecutive odd numbers is 284
    11·1 answer
  • What is the probability of getting a total of 6 or 8 on a roll of a pair of dice?
    7·2 answers
  • Which angle in triangle XYZ has the largest measure?
    6·1 answer
  • Given right triangle GYK, what is the value of tan(G)?
    12·2 answers
  • I would like assistance with this please​
    9·1 answer
  • Luerityilly CIUSS SECUMS UN SUNIUS
    6·2 answers
  • You have ducks and sheep in a farmyard. If there are 102 legs and 33 heads how many of each do you have? Set up and solve it to
    9·1 answer
  • $600 is invested for a year. If the yearly interest rate
    6·1 answer
  • Which of the following expressions give the distance between the endpoints of the segment shown on the number line below? Select
    6·2 answers
  • C
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!