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
PIT_PIT [208]
3 years ago
7

The nickles and dimes had a value of $5.75. if there were 70 coins in all, how many were nickles?

Mathematics
1 answer:
Murrr4er [49]3 years ago
5 0

Answer:

25

Step-by-step explanation:

If all 70 were nickels, the value would be $3.50 Since that is 2.25 less, that means it needs 45 more 5 cents. Therefore, you would replace 5 of the nickels with dimes. This means there are 25 nickels and 45 dimes.

You might be interested in
Add: (4a.”+ 6a2- 10a - 4) +(6a + a²+ a + 7)
sineoko [7]
(2a-1 )exponent two•(3a + 2) exponent 2• (4a-3) exponent 2
3 0
2 years ago
An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maxim
Flura [38]

Answer:

The 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the population mean, when the population standard deviation is not provided is:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

The sample selected is of size, <em>n</em> = 50.

The critical value of <em>t</em> for 95% confidence level and (<em>n</em> - 1) = 49 degrees of freedom is:

t_{\alpha/2, (n-1)}=t_{0.05/2, 49}\approx t_{0.025, 60}=2.000

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

Compute the sample mean and sample standard deviation as follows:

\bar x=\frac{1}{n}\sum X=\frac{1}{50}\times [1+5+6+...+10]=6.76\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{49}\times 31.12}=2.552

Compute the 95% confidence interval estimate of the population mean rating for Miami as follows:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

     =6.76\pm 2.000\times \frac{2.552}{\sqrt{50}}\\\\=6.76\pm 0.722\\\\=(6.038, 7.482)\\\\\approx (6.0, 7.5)

Thus, the 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

7 0
2 years ago
What is the pattern in the values as the exponents increase?
likoan [24]

Answer:

The answer is D. Multiply the previous value by 3.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
A _____________ is a three-dimensional form that has length and width but minimum thickness.
ira [324]
A plane is a three-dimensional form that has length and width by minimum thickness. 
8 0
3 years ago
The width of the fountain in Luke's drawing from the example is 2 cm. What is the width of the fountain in Isabella's scale draw
Otrada [13]

Answer:

Do you have a image of the fountains, send it to me.and I'll help

5 0
3 years ago
Read 2 more answers
Other questions:
  • Quadratic equation please help
    9·1 answer
  • Can someone help me simplify this?
    12·1 answer
  • 15x + 3 + 2x + 9r - (8 - r)
    13·1 answer
  • Please help me guys please I’m stuck on this
    15·1 answer
  • T = 2π √l/g Re-arrange to make g the subject.
    11·1 answer
  • At an opening of a new art gallery called Zayrelyn's, the owner hired Jarone as caterer to serve light snacks. The owner created
    8·1 answer
  • Find the slope of the line.<br><br><br> please help<br><br><br> will mark brainlyest
    15·1 answer
  • Needing help with this problem​
    11·1 answer
  • Aaron is making a jewelry box of wood in the shape of a rectangular prism the jewelry box will have the dimensions shown in the
    15·1 answer
  • What’s the answer to this question please help mee
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!