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
Assoli18 [71]
2 years ago
10

When 8 is subtracted from the square of a number, the result is 7 times the number.

Mathematics
1 answer:
LuckyWell [14K]2 years ago
4 0

Answer:

8

Step-by-step explanation:

x^2 - 8 = 7x

x^2 - 7x - 8=0

(x - 8)(x + 1)=0

x - 8= 0   x + 1=0

x=8           x= -1

8 is the positive solution

You might be interested in
Please answer these 2 questions. Will mark brainiest. Thank you!!
Ivahew [28]
1. Answer A and C
2. Answer B
Sorry if I’m wrong
3 0
2 years ago
Read 2 more answers
Find the height of a cuboid whose volume is 540 cu.cm and base area is 90 sq.cm .
EastWind [94]

Answer:

540/90=6

and is 6 cm

height is 6 cm

6 0
2 years ago
Use the given information to find the p​-value. ​Also, use a 0.05 significance level and state the conclusion about the null hyp
Hatshy [7]

Answer:

We can assume that the statistic is z_{calc}=0.78

p_v = 2* P(z>0.78) = 0.435

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the true proportion of interest is not different from 3/5

Step-by-step explanation:

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is equal to 3/5 or not.:  

Null hypothesis:p=3/5  

Alternative hypothesis:p \neq 3/5  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

We can assume that the statistic is z_{calc}=0.78

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:

p_v = 2* P(z>0.78) = 0.435

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the true proportion of interest is not different from 3/5

7 0
3 years ago
PLZZ HELP HAVE NO TIM!!
12345 [234]
The first one. X is greater than or equal to -1
3 0
3 years ago
Read 2 more answers
3 1 - 2.6<br>________<br>0.05<br>​
olya-2409 [2.1K]

Work:

\frac{31 - 2.6}{0.05}

\frac{28.4}{0.05}

Answer:

567. \frac{}{9}

6 0
2 years ago
Other questions:
  • a grain of sand has a mass of approxlmently 6 x 10^-2 grams. earth has a mass of approximately 6 x 10^28 grams. hiw many times s
    11·2 answers
  • Compute the exact interest on $5,870 at 12% if the money is borrowed from June to December of the same year.
    7·1 answer
  • A store that buys and sells used video games buys a game at a cost of ​$19 and sells it at a selling price of ​$22. Find the mar
    7·1 answer
  • Need help solving this.
    9·1 answer
  • Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?
    10·2 answers
  • The value of 4’s in 305,444
    14·2 answers
  • Can somebody help me it will mean a lot
    12·1 answer
  • What would be the final elevation if a moth is flying at at 9 meters above the ground and changes by -4?
    6·1 answer
  • Use the Pythagorean theorem to find y.
    13·1 answer
  • PLEASE HELP I NEED TO PASS MATH!!<br> Solve for x. Numerical answer only.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!