Can someone help lol

The sum of two positive integers, x and y, is not more than 40. The difference of the two integers is at least 20. Chaneece choo

oksian1 [2.3K]

Chaneece chooses x as the larger number and uses the inequalities y ≤ 40 – x and y ≤ x – 20 to determine the possible solutions.

y ≤ 40 – x, if x must be between 0 and 10, y must be between 20 and 40 it is true
proof
for x=0 and y=10, y ≤ 40 – x equivalent to 10<40-0=40 it is true
x=10, y=30, y ≤ 40 – x equivalent to 30=40-10=30 it is true

the answer is A) Yes, Chaneece found the correct solution.

5 0

3 years ago

Read 2 more answers

What is the mean and standard deviation of the random variable Y (the number of females out of 40 who are color blind)? Answers

Debora [2.8K]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Colorblindness is any abnormality of the color vision system that causes a person to see colors differently than most people, or to have difficulty distinguishing among certain colors Colorblindness is gender-based, while the majority of sufferers being males.

Roughly 8% of white males have some form of colorblindness, while the incidence among white females is only 1%. A random sample of 20 white males and 40 white females was chosen.

Let X be the number of males (out of the 20) who are colorblind.

Let Y be the number of females (out of the 40) who are colorblind.

What is the mean and standard deviation of the random variable Y (the number of females out of 40 who are color blind)? Answers may be rounded.

Given Information:

Female colorblindness proportion = 1%

Male colorblindness proportion = 8%

Female sample size = 40

Male sample size = 20

Required Information:

Mean = μ = ?

Standard deviation = σ = ?

Answer:

Mean = μ = 0.40

Standard deviation = σ = 0.015

Step-by-step explanation:

Let us check if the condition np ≥ 10 is satisfied or not

np

40*0.01

0.4 < 10

Since the condition np ≥ 10 is not satisfied the binomial random variable cannot be well approximated by a normal random variable. A larger sample size would be required to satisfy the condition np ≥ 10.

The mean is

μ = np

μ = 40*0.01 = 0.40

The standard deviation is

σ = √p(1 - p)/n

σ = √0.01(1 - 0.01)/40

σ = 0.015

6 0

3 years ago

Read 2 more answers

Helppppp is this correct or nottt

Studentka2010 [4]

Answer:

Yes, you are correct.

Step-by-step explanation:

Have a great day!

8 0

3 years ago

Describe a real world situauationthat could be modled by dividing two rational numbers

Dima020 [189]

You have 10 slices of cake, you and your friends Jerry, George, Martha, and Jenny ( just an example ) eat 2 slices of cake.
A more real life one would be:
You have 6 bills to pay off, then two more come in, you only pay off 4,
( I hope this helped, I'm sorry if any of this is wrong:) )

7 0

3 years ago

7. Which dimensions result in the minimum perimeter for a rectangle with area 42.0 cm2?

natali 33 [55]

9514 1404 393

Answer:

7. d. l = 6.48 cm, w = 6.48 cm

8. d. square

Step-by-step explanation:

For a given area, the perimeter can always be shortened by reducing the length of the long side and increasing the length of the short side. When you get to the point where you can't do that, then you have the minimum perimeter. You will reach that point when the sides are the same length: the rectangle is a square.

__

7. In light of the above, the best dimensions are √42 ≈ 6.48 cm for length and width.

__

8. In light of the above, the shape is a square.

_____

The attached graph shows the length of one side (x) and the associated perimeter. The other side is 42/x, which will also be 6.48.

8 0

3 years ago