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
IrinaK [193]
2 years ago
11

Simplify:(4x2 - 2x) - (-5x2 - 8x). yall dont gotta simplify this im just bored

Mathematics
1 answer:
jeka57 [31]2 years ago
4 0

Answer:

wsp?

Step-by-step explanation:

9x^2 + 6x

You might be interested in
A random sample of 40 binomial trials resulted in 14 successes. test the claim that the population proportion of successes does
mylen [45]

Using the z-distribution, since the p-value of the test is of 0.057 > 0.05, there is not enough evidence that the population proportion of successes does not equal 0.50.

<h3>What are the hypotheses tested?</h3>

At the null hypotheses, we test if the proportion of successes equals 0.5, hence:

H_0: p = 0.5

At the alternative hypotheses, we test if it does not equal, hence:

H_1: p \neq 0.5

<h3>What is the test statistic?</h3>

The test statistic is given by:

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

In which:

  • \overline{p} is the sample proportion.
  • p is the proportion tested at the null hypothesis.
  • n is the sample size.

For this problem, the parameters are given by:

n = 40, \overline{p} = \frac{14}{40} = 0.35, p = 0.5

Hence the test statistic is given by:

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

z = (0.35 - 0.5)/(0.5/sqrt(40))

z = -1.9.

<h3>What is the decision?</h3>

Using a z-distribution calculator, considering a two-tailed test, as we are testing if the proportion is different of a value, with z = -1.9, we get that the p-value of the test is of 0.057.

Since the p-value of the test is of 0.057 > 0.05, there is not enough evidence that the population proportion of successes does not equal 0.50.

More can be learned about the z-distribution at brainly.com/question/16313918

#SPJ4

5 0
1 year ago
Mr. Fink's economy car can travel 420 miles on a 12-gallon tank of gas. Determine how many miles he can travel on 8 gallons.
Sphinxa [80]

Answer:

280 miles

Step-by-step explanation:

So, 420 miles=12 gallons

That means that for 1 gallon you would be able to go 35 miles.

Just multiply that by 8. 35*8=280

3 0
3 years ago
The expression 3(2x + 7) − 4(−3x + 5) is equal (=) to
Westkost [7]

Answer:

-6x+26

Step-by-step explanation:

6x+21-12x+5

-6x+26

8 0
3 years ago
Read 2 more answers
Is the line for the equation x = 4 horizontal or vertical? What is the slope of the line? Select the best answer
Arlecino [84]

Answer:

x=4 is vertical line it's an undefined slope

7 0
2 years ago
Y is inversely proportional to the cube of x. Work out the value of x when y = 64. please help :)
sp2606 [1]

Answer:

give brainly please thx

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • The following dot plot represents student scores on the Unit 1 math test. Scores are in whole number increments.
    14·1 answer
  • SOLVE THE EQUATION SHOW YOUR WORK 3x = 45
    6·2 answers
  • The price of a new car is $29,990. If the sales tax rate is 6.5%, then how much sales tax is being charged? What is the total co
    6·1 answer
  • Helppp please i need this asap
    15·1 answer
  • PLEASE HELP ME ASAP<br> Find the area. Be sure to write the formula, work and answer with units.
    7·2 answers
  • WILL MARK BRAINLIEST
    8·1 answer
  • Jacob took a total of 12 quizzes over the course of 3 weeks.
    10·1 answer
  • HELP PLEASE I NEED TO TURN THIS IN BEFORE WEDNESDAY
    5·1 answer
  • If f(x)= 3x+1 and g(x)= x^2-6 FIND (f+g)(x)
    11·1 answer
  • Suppose two bicyclists start at the same location.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!