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
Delicious77 [7]
3 years ago
8

Jackie has fewer than 20 h to work on her jewelry. It takes her half an hour to make a necklace and an hour to make a bracelet.

She wants to make x necklaces and y bracelets, and she wants at least twice as many bracelets as necklaces.
Select all inequalities that model this situation.




y>2x

x>0

0.5x+y≤20

0.5x+y<20

x≥0

y≥2x


Adam needs both small and large cones to set up for a soccer practice. He knows there are fewer than 30 cones in the storage room. He needs at least a dozen large cones.

Let x represent the number of small cones and y represent the number of large cones.

Select all inequalities that model this situation.




y≥12

x+y≤30

x>0

y>12

x+y<30

x≥0
Mathematics
1 answer:
aivan3 [116]3 years ago
8 0

Question 1.

(Jackie)

0.5x+y<20

y≥2x

x≥0

You might be interested in
What the answer for this ? :/
goblinko [34]
Hello there! I can help you! In order to answer those questions, we need to plug in the values, based off of the variable.

g. Okay. We are solving b - 10. b = -8. When you subtract something from a negative number, the number is even lower. Let's add the numbers first and then put in the negative symbol. 8 + 10 is 18. Put the negative sign and you get -18. The difference is -18.

h. Now, we solve a - b. a = 5 and b = -8. Because we are subtracting a negative number from a positive, we have to add both numbers, which means the number gets bigger. Ignore the negative sign and add. 5 + 8 is 13. There. The sum is 13.

i. The problem is c - a. c = -9 and a = 5. So as explained on problem G, for this problem, ignore the negative symbol and add. 9 + 5 is 14. Plug in the negative sign to get -14. There. The difference is -14.
3 0
3 years ago
How many ounces in 2 pints
Elis [28]

Answer:

32 US Fluid Ounces

More Details would be nice though if i'm incorrect.

6 0
2 years ago
Read 2 more answers
A five card hand is dealt. What is the probability that the hand is all diamonds?
Stella [2.4K]
Two out of five Would be my answer
5 0
3 years ago
A study was conducted and two types of engines, A and B, were compared. Fifty experiments were performed using engine A and 75 u
USPshnik [31]

Answer:

a) -6 mpg.

b) 2.77 mpg

c) The 95% confidence interval for the difference of population mean gas mileages for engines A and B and interpret the results, in mpg, is (-8.77, -3.23).

Step-by-step explanation:

To solve this question, we need to understand the central limit theorem, and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Gas mileage A: Mean 36, standard deviation 6, sample of 50:

So

\mu_A = 36, s_A = \frac{6}{\sqrt{50}} = 0.8485

Gas mileage B: Mean 42, standard deviation 8, sample of 50:

So

\mu_B = 42, s_B = \frac{8}{\sqrt{50}} = 1.1314

Distribution of the difference:

Mean:

\mu = \mu_A - \mu_B = 36 - 42 = -6

Standard error:

s = \sqrt{s_A^2+s_B^2} = \sqrt{0.8485^2+1.1314^2} = 1.4142

A. Find the point estimate.

This is the difference of means, that is, -6 mpg.

B. Find the margin of error

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = zs = 1.96*1.4142 = 2.77

The margin of error is of 2.77 mpg

C. Construct the 95% confidence interval for the difference of population mean gas mileages for engines A and B and interpret the results(5 pts)

The lower end of the interval is the sample mean subtracted by M. So it is -6 - 2.77 = -8.77 mpg

The upper end of the interval is the sample mean added to M. So it is -6 + 2.77 = -3.23 mpg

The 95% confidence interval for the difference of population mean gas mileages for engines A and B and interpret the results, in mpg, is (-8.77, -3.23).

8 0
2 years ago
Worth 11 points and please actually help me instead of just taking the points
9966 [12]

Answer:

A' = (-6, -2)

Step-by-step explanation:

A is at ( -3,-1)

The dilation factor is 2 so multiply by 2

A' = (-3*2, -1*2)

A' = (-6, -2)

3 0
3 years ago
Read 2 more answers
Other questions:
  • In the number 1934 is a value of 9 in 100 place 10 times the value of the 3 in the tens place
    13·1 answer
  • Ravi is riding his bicycle. He takes 6 hours to ride 76.8 kilometers. What is his speed?
    15·1 answer
  • Joe has some pocket money. He spends 90% of it. He has 50p left. How much pocket money did he have?
    13·2 answers
  • The baseball coach bought 8 new baseballs for $3 each. The basketball coach bought 6 new basketballs for $11 each. How much more
    9·1 answer
  • HELP ASAP!!!!!!!!!!!!!!!!!
    7·2 answers
  • What professionals most directly use geometry in their work
    14·1 answer
  • Can anyone help<br> Me with this problem plz
    14·1 answer
  • #14 Helppppp me plz this make no sense to me
    12·2 answers
  • Let x=−118 x = - 11 8 and y=−114 y = - 11 4 .
    10·2 answers
  • A recipe for chicken marinade says, "Mix 3 parts oil with 2 parts soy sauce and 1 part orange juice." If you need 42 cups of mar
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!