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
Makovka662 [10]
3 years ago
6

A drink costs 3 dollars and a sandwich costs 5 dollars. You buy 10 items (some combination of drinks and sandwiches) and you spe

nd 42 dollars.How many of each item did you buy?
Mathematics
1 answer:
andrew-mc [135]3 years ago
7 0

See https://web2.0calc.com/questions/can-someone-help-please_7.

You might be interested in
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain sca
blondinia [14]

The confidence interval for mean of the "before-after" differences is \fbox{(-0.4037,1.8037)}

Further explanation:

Find the difference between the before pain and the after pain.

Difference = before-after

Kindly refer to the Table for the difference of between the before and after pain.

Sum of difference = 5.6

Total number of observation = 8

Mean of difference = 0.7

Sample standard deviation s = 1.3201

Level of significance = 5\%

Formula for confidence interval = \left( \bar{X} \pm t_{n-1, \frac{\alpha}{2}\%} \frac{s}{\sqrt{n}} \right)

confidence interval = \left( 0.7 \pm t_{8-1, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)

confidence interval = \left( 0.7 \pm t_{7, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)

From the t-table.

The value of t_{7, \frac{5}{2}\%=2.365

Confidence interval = ( 0.7 \pm 2.365}\times \frac{1.3201}{\sqrt{8}}) \right)

Confidence interval = \left( 0.7 - 2.365}\times \0.4667,0.7 + 2.365}\times \0.4667) \right

Confidence interval = (0.7-1.1037,0.7+1.1037)

Confidence interval = \fbox{(-0.4037,1.8037)}

The 95\% confidence interval tells us about that 95\% chances of the true mean or population mean lies in the interval.

Yes, the hypnotism appear to be effective in reducing pain as confidence interval include includes the positive deviation from the mean.

Learn More:

1. Learn more about equation of circle brainly.com/question/1506955

2. Learn more about line segments brainly.com/question/909890  

Answer Details:

Grade: College Statistics

Subject: Mathematics

Chapter: Confidence Interval

Keywords:

Probability, Statistics, Speed dating, Females rating, Confidence interval, t-test, Level of significance , Normal distribution, Central Limit Theorem, t-table, Population mean, Sample mean, Standard deviation, Symmetric, Variance.

7 0
3 years ago
Read 2 more answers
Find the smallest of two consecutive even integers if the square is 10 more than the larger
djverab [1.8K]
I think your answers are 4 and 6
7 0
3 years ago
An Arithmetic Sequence will yield a graph that is...
slava [35]

Answer:

A straight line.

Step-by-step explanation:

An arithmetic sequence has a common difference so the slope  of the graph will be constant, giving a straight line.

8 0
3 years ago
Help me with this problem 9x-(2x+8)=. And show your work? I'll be giving BRAINILEST!
kykrilka [37]
So first, you want to open the parenthesis here.

So, to do that, first look at the symbol before the parenthesis.

In this case it's a -.

So when it's a -, reverse the symbol inside the parenthesis. (This is because if you don't you're subtracting 2x and then adding 8, when really you're subtracting both 2x and 8.)

So,

9x - 2x - 8

Or simplified,

7x - 8
4 0
2 years ago
Read 2 more answers
I need help : D pleasee answer
Blizzard [7]
There’s nothing showing up. I think you didn’t add a picture
4 0
2 years ago
Read 2 more answers
Other questions:
  • How to solve 9+4^3×(20-8)÷2+6
    9·1 answer
  • What is the coefficient of the x-term in the expression 4x+5xy-2y
    7·1 answer
  • Two cars leave a town at the same time heading in opposite directions. One car is traveling 12 mph faster than the other. After
    6·1 answer
  • What does it mean to be a decay type of exponential function?
    9·1 answer
  • Find all solutions in the interval [0, 2π). (sin x)(cos x) = 0
    8·2 answers
  • If f(x)= 3x² – 2, find (-3)*f(x)
    12·1 answer
  • There are 3 counselors assigned to each group of 24 campers, how many campers would there be if there was 9 counselors ​
    8·2 answers
  • mr. grover stayed on q hotel for two days. the room rent was ₹3,500 per day. he also had to pay a luxury tax of 7% on the room r
    10·1 answer
  • You are a loan officer at the West Elm Savings and Loan. Mr. and Mrs. Brady are in your office to apply for a mortgage loan on a
    11·1 answer
  • What is 901,000 written in scientific notation?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!