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
stepan [7]
3 years ago
12

PLEASE HELP ILL GIVE BRAINLIEST AND 20 POINTS!!!!!

Mathematics
1 answer:
kherson [118]3 years ago
4 0

For each t-shirt sold, which I'll call <em>t</em>, 8th grade makes $15.

For each hat sold, which I'll call <em>h,</em> 8th grades makes $5.

They want to raise $900

A: The equation to represent this situation is 15t+5h=900 because if 8th grade adds up all the profits from both hats and t-shirts, the goal is to make $900, so the total profit from shirts and hats should equal 900 dollars.

B: I'm just going to choose random numbers. Let's say nobody wanted to buy a hat from the 8th graders (h=0). You'd end up with

15t+5(0)=900

15t=900

t=60 - If they sold 0 hats they would have sold 60 shirts to raise $900

Now let's say it was the other way around - nobody wanted to buy t-shirts

15(0)=5h=900

5h=900

h=180 - If they sold 0 t-shirts they'd have to sell 180 hats to raise $900

Finally let's say they sold 30 t-shirts

15(30)+5h=900

450+5h=900

5h=450

h=90 - They'd have to sell 30 t-shirts and 90 hats to raise $900

You might be interested in
(1 point) The shelf life of a battery produced by one major company is known to be normally distributed with a mean life of 3 ye
NeX [460]

Answer:

z=-0.994

And if we solve for a we got

a=3 -0.994*0.4=2.6024

So the value of height that separates the bottom 16% of data from the top 84% is 2.6024 years

The answer rounded would be 2.6 years approximately  

Step-by-step explanation:

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the shelf life of a population, and for this case we know the distribution for X is given by:

X \sim N(3,0.4)  

Where \mu=3 and \sigma=0.4

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.84   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.16 of the area on the left and 0.84 of the area on the right it's z=-0.994. On this case P(Z<-0.994)=0.16 and P(z>-0.994)=0.84

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-0.994

And if we solve for a we got

a=3 -0.994*0.4=2.6024

So the value of height that separates the bottom 16% of data from the top 84% is 2.6024 years

The answer rounded would be 2.6 years approximately  

8 0
4 years ago
1. What is 3/6 simplified <br><br> 2. What is a common factor of 5 and 15
horsena [70]

Answer:

1-1/2. 2-15

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve each of the following equations. <br><br> |3x−4(x+1)|=2
kramer

Answer:

-2, -6

Step-by-step explanation:

|3x−4(x+1)|=2

|3x - 4x - 4| = 2

|-x - 4| = 2

-x - 4 = 2

-x = 6

x = -6

-x - 4 = -2

-x = 2

x = -2

7 0
3 years ago
Enter the median of the following dataset 7,15,12,13,8,11
Leni [432]

The median is the value that is in the middle of a dataset.

The first step to find the median is to order the values from least to greatest:

7, 8, 11, 12, 13, 15.

Since the number of data is even, the median will be the average of the pair of values that is in the middle, in this case, 11 and 12:

\frac{11+12}{2}=11.5

The median of the data set is 11.5.

8 0
1 year ago
I really dont understand algebra 1 sem 1 :'( Im wayyy behind because of it :c pls help Idk when I should distribute or anything.
pickupchik [31]
I am in algebra I too. what do you want to know. text me on message and I will explain it to you. do you agree?
3 0
3 years ago
Read 2 more answers
Other questions:
  • Help math problem please
    11·1 answer
  • a carpenter has a board that is 8 feet long.he cuts off two pieces,one piece is 3 1/2 feet long and the other is 2 1/3 feet long
    11·1 answer
  • Find the x intercept of the graph of the equation -2(x+1)^2 +18
    5·2 answers
  • What is the equation of the line with a x-intercept of 5 and a point (-2, -14)?
    13·1 answer
  • If x -2 = 8, find 3x
    11·1 answer
  • Find the inter-quartile range of the given data set.
    13·2 answers
  • A. 3 movie tickets cost $36.
    12·1 answer
  • Find the value of c x 8 when c=9.
    13·2 answers
  • Which equation has the solutions x = 2.5 and x = -3 ?
    7·1 answer
  • What are the Answers to 1-10?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!