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Fynjy0 [20]
3 years ago
11

The Science Club went on a two-day field trip. The first day the members paid $30 for transportation plus $10 per ticket to the

planetarium. The second day they paid $100 for transportation plus $7 per ticket to the geology museum. Write an expression to represent the total cost in dollars for two days for the n members of the club.
An expression that represents the total cost in dollars for two days for the n members of the club is given by
Mathematics
2 answers:
Brilliant_brown [7]3 years ago
7 0

Answer:

just add all the numbers which means $147

sashaice [31]3 years ago
3 0

Answer: I believe is $147 because u have to add all the number and it will give u the total of 147. So the total cost in dollars for two days for the n members of the cub will be $147.

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What is the y-intercept of the table below?
Kryger [21]

Answer:

y-2

Step-by-step explanation:

7 0
3 years ago
How much would you save, per pound, if you buy your ground beef at SuperGrocery A, rather than SuperGrocery B?
zhannawk [14.2K]

Hence, the amount saved by buying at Supergrocery A is; $6.10 - $4.76 = $1.34

<h3>Slope of Graphs;</h3>

According to the questions;

The cost to buy 1 pound of beef from the Supergrocery A is the slope of the given graph;

  • Slope, m = (47.60 - 23.80)/(10-5)

  • m = 23.80/5

  • m = 4.76

Therefore, the cost per pound of beef at Supergrocery A is $4.76 which is cheaper than $6.10 at Supergrocery B.

Hence, the amount saved by buying at Supergrocery A is; $6.10 - $4.76 = $1.34

Read more on slope;

brainly.com/question/3493733

6 0
2 years ago
A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selec
VMariaS [17]

Answer:

19.1-3.355\frac{1.5}{\sqrt{9}}=17.42    

19.1+3.355\frac{1.5}{\sqrt{9}}=20.78    

And the best option would be:

C. [17.42,20.78]

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=19.1 represent the sample mean

\mu population mean (variable of interest)

s=1.5 represent the sample standard deviation

n=9 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=9-1=8

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,8)".And we see that t_{\alpha/2}=

Now we have everything in order to replace into formula (1):

19.1-3.355\frac{1.5}{\sqrt{9}}=17.42    

19.1+3.355\frac{1.5}{\sqrt{9}}=20.78    

And the best option would be:

C. [17.42,20.78]

5 0
3 years ago
A superhero asked his nemesis how many cats she has. she answered with a riddle "Three-fourths of my cats plus seven" how many c
liq [111]
Let C be the number of cats of the superhero. With this, the number of cats of nemesis have is 3C/4 + 7. The numbers should be equal such that,
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3 years ago
Write the elements belonging to the set {x|x is a natural number less than 10
Feliz [49]

Answer:

The set A = { 1,2,3,4,5,6,7,8,9}

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the set

 { x/x/ is a natural number less than 10 }

<u><em>Natural numbers :</em></u>

The natural numbers are

          { 1,2,3,4,5,6,7,8,9,10,.........}

The set A =  { x/x/ is a natural number less than 10 }

The set A = { 1,2,3,4,5,6,7,8,9}

4 0
3 years ago
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