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
nikklg [1K]
3 years ago
13

I need help with these 2 questions.

Mathematics
1 answer:
BartSMP [9]3 years ago
5 0

12.) she gets 70  because she sells 60  fiction and 20 non fiction and you add 60 to 10 because the things are half off

You might be interested in
Why do chairs have legs?
GalinKa [24]

Answer:

cuz they are chairs

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
When h has the value 5 calculate 6h+9
jonny [76]
The answer is 39 because 6 times 5 is 30. 30 plus 9 is 39. :)
6 0
3 years ago
Read 2 more answers
Multiple-choice questions on Advanced Placement exams have five options: A, B, C, D, and E. A random sample of the correct choic
Semenov [28]

Answer:

Option <em>B</em> is not the most common correct choice.

Step-by-step explanation:

The multiple-choice questions on Advanced Placement exams have five options: A, B, C, D, and E.

The probability that any of these five option is the correct answer is:

p=\frac{1}{5}=0.20

A random sample of 400 multiple-choice questions on Advanced Placement exam are selected.

The results showed that 90 of the 400 questions having B as the answer.

To test the hypothesis that option B is more likely the correct answer for most question, the hypothesis can be defined as:

<em>H₀</em>: All the options are equally probable, i.e. <em>p</em> = 0.20.

<em>Hₐ</em>: Option B is more likely the correct option, i.e. <em>p</em> > 0.20.

Compute the sample proportion as follows:

\hat p=\frac{90}{400}=0.225

The test statistic is:

z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}=\frac{0.225-0.20}{\sqrt{\frac{0.20(1-0.20)}{400}}}= 1.25

The test statistic is 1.25.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the <em>p</em>-value as follows:

p-value=P(Z>1.25)\\=1-P(Z

*Use a <em>z</em>-table.

The <em>p</em>-value is 0.1057.

The <em>p</em>-value of the test is quite large. Thus, the null hypothesis was failed to rejected.

Hence, it can be concluded that option <em>B</em> is not  the most common correct choice.

7 0
3 years ago
(2x-1)^2=<br><br> Some one plz help.....
Arlecino [84]

Answer: 4x^2−4x+1

Step-by-step explanation:

(2x-1)^2

Square of Difference: (a−b)^​2=a^​2−2ab+b^2.

(2x)^​2−2*2x+1

Multiplication Distributive Property: (xy)^​a=x^{a} y^{a}

2^​​​2x^2−2*2x+1

4x^2−2*2x+1

4x^2−4x+1

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)  

- Cutiepatutie ☺❀❤

3 0
3 years ago
How to solve long division by using long division 711.9 divided by 8.4
harkovskaia [24]
Multiply both 711.9 and 8.4 by 10 which will remove the decimal point. 
and make the calculation much more easier
 the required answer would be 84.75

5 0
3 years ago
Other questions:
  • Jayne has 3 quarters, 2 dimes, 1 nickel and 2 pennies in her pocket.how many different amounts of money can she make using some
    15·1 answer
  • Using the distributive property to rewrite the expression as a multiple of a sum of two numbers with no common factor, how would
    13·1 answer
  • In a translation, the line segments that connect each point on the preimage to the corresponding point on the image are not only
    9·2 answers
  • Based on the Nielsen ratings, the local CBS affiliate claims its 11:00 PM newscast reaches 41 % of the viewing audience in the a
    8·1 answer
  • Does anyone know the answer to this question?
    6·1 answer
  • Find the y intercept of the graph
    14·1 answer
  • F(x) = x^2 What is g(x)?
    5·1 answer
  • What is the Volume?
    13·1 answer
  • What is 44.5443495 rounded to the nearest thousand
    5·1 answer
  • Evaluate-16 to the power of -3/4
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!