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
anzhelika [568]
3 years ago
7

Subtract: 3x 2 -7x 4 from 5x 2 - 3x 8.

Mathematics
1 answer:
Andrew [12]3 years ago
4 0
(3x² -7x⁴) from (5x² - 3x⁸)

= 5x² - 3x⁸ - (3x² -7x<span>⁴ )

= </span> 5x² - 3x⁸ - 3x² + 7x<span>⁴ 

= </span>- 3x⁸ + 7x⁴ +  5x² <span>- </span><span>3x²
</span>
= - 3x<span>⁸ </span>+ 7x⁴ +  2x<span>²</span>
You might be interested in
Hypothesis Testing for Means with Small Samples
Scorpion4ik [409]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is

X: volume of root beer in a Windsor Bottling Company can.

A sample of n=24 cans was taken and their contents measured, resulting:

X[bar]= 11.4 oz

S= 0.62 oz

Assuming that the variable has a normal distribution X~N(μ;σ²), the parameter of interest is the average contents of the root beer cans of the Windsor Bottling Company (μ)

The claim is that the population mean content of the cans is different from 12 oz, symbolically: μ ≠ 12

The statistical hypothesis (Null and alternative) have to be complementary, exhaustive and mutually exclusive. The null hypothesis is the "no change" hypothesis and always carries the "=" sign.

If the claim is μ ≠ 12, its complement is μ = 12, the expression carrying the "=" sign will be the null hypothesis and its complement will be the alternative hypothesis:

H₀: μ = 12

H₁: μ ≠ 12

α: 0.05

To test the population mean of this normal population, you have to apply a one sample t-test, with statistic:

t= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~t_{n-1}

t_{H_0}= \frac{11.4-12}{\frac{0.62}{\sqrt{24} } } = -4.74

This test is two-tailed, using the critical value approach, you have to determine two rejection regions. Meaning, you'll reject the null hypothesis to small values of the statistic or to high values of the statistic.

t_{n-1;\alpha /2}= t_{23;0.025}= -2.069

t_{n-1;1-\alpha /2}= t_{23;0.975}= 2.069

The decision rule is:

If t_{H_0} ≤ -2.069 or if t_{H_0} ≥ 2.069, then you reject the null hypothesis.

If -2.069 < t_{H_0} < 2.069, then you do not reject the null hypothesis.

The value is less than the left critical value, the decision is to reject the null hypothesis.

Then you can say that with a 5% significance level, there is significant evidence to reject the null hypothesis, then the average amount of root beer of the Windsor Bottling Company is different from 12 oz, this means that the claim about the amount of root beer in the cans is correct.

I hope it helps!

6 0
3 years ago
What is the simplified form of the expression? HELP ASAP
galina1969 [7]

Answer:

360

Step-by-step explanation:

\frac{5(14 - 2)^{2} }{2}  =  \frac{5 {(12)}^{2} }{2}  =  \frac{5(144)}{2} \\  \\  \frac{720}{2}   = 360

6 0
2 years ago
Read 2 more answers
Plz help i need help
Brums [2.3K]
A(3,1) B(2,5) C(4,4)
7 0
2 years ago
Evaluate 16^1/2 and show work​
LUCKY_DIMON [66]
Here is your answer

{16}^{1/2} = ({4}^{2})^{1/2}\\= {4}^ {2× 1/2}\\= 4

HOPE IT IS USEFUL
4 0
3 years ago
Based on the graph below, what is the y-intercept?
Sphinxa [80]

Answer:

the y intercept you are looking for is -3

4 0
3 years ago
Other questions:
  • Graph the inequality. y &lt; 3x - 5
    10·2 answers
  • PLEASE HELPPPP Instructions: State what additional information is required in order to know that the triangles are congruent for
    10·2 answers
  • Using the given information, what is the sales mix variance?
    12·1 answer
  • you are out with friends. half of you want to go bowling and the other half want to go to a movie. how will you make a fair deci
    8·1 answer
  • 1) MZEHC
    14·1 answer
  • Once a commercial plane reaches the desired altitude,
    15·1 answer
  • PLS HELP AND EXPLAIN HOW TO DO IT ASWELL ILL MARK YOU BRAINLIEST ​
    9·2 answers
  • Compare and contrast the words malfunction and dysfunction
    12·1 answer
  • Mario has $15. He spends $6.25 on admission to the ice skating rink. How much money does he
    13·1 answer
  • A dresser with the mirror attached is 6.28 feet tall. The difference between their heights is 1.28 feet. What are the heights of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!