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olga2289 [7]
3 years ago
7

Please give me the correct answer.​

Mathematics
1 answer:
Vitek1552 [10]3 years ago
8 0

Answer:

Top Right Graph

Step-by-step explanation:

By looking at the equation, we can see that y = -2x + 1 is in slope-intercept form because it's in a  y = mx + b format. If a line can be written in slope-intercept form, then it must be linear, meaning that the graph must be one straight line.

Now, this narrows it down to two graphs. However, remember that in equations written in slope-intercept form, the m of the equation, or the coefficient of the x-term, represents the slope. Thus, the slope of the equation is -2. Now, since the slope is negative, then the graph decreases (reading from left to right).

Therefore, since the top right graph is the only graph that is linear and decreases, it must be the answer.

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Amy Jo found that the perimeter of a square was 53.2 square inches. What is the side length of the square?
Tpy6a [65]

perimeter of a square is 4 times side length (4s)

to find the length of a side divide the perimeter by 4

53.2 / 4 = 13.3

 so each side is 13.3 inches

8 0
3 years ago
A shipment of 20 similar laptop computers to a retail outlet contains 3 that are defective. If a school makes a random purchase
otez555 [7]

Answer:

Step-by-step explanation:

Total number of laptops, N = 20

Defective laptops, n = 3

School purchase 2 laptops

Case 1:

Both laptops are non defective

Probability to choose 2 laptops which are non defective

Number of non defective laptops = 20 - 3 = 17

Total number of laptops = 20

Probability, P = 17/20 = 0.85

Case 2:

One laptop is defective

Probability to chose 1 defective and one non defective laptop

P' = 3/20 x 17/19 = 0.134

Case 3:

Both laptops are defective

Choosing of 2 laptops out of 3 = 3 C 2 = 3

choosing of 2 laptops out of 20 = 20 C 2 = 190

Probability of choosing two defective laptops = 3 / 190 = 0.0158

P'' =

4 0
3 years ago
531-266 show your work
BartSMP [9]

Answer: The answer is 265. Hope this helps !!

4 0
3 years ago
Read 2 more answers
What is the x-intercept of the following function?<br> h(x) = 4x+3 - 2
ddd [48]

Answer:

Let h(x) = y

y = 4^(x+3) -2

For x intercept let y = 0

2 = 4^(x+3)

2= 2^2(x+3)

1 = 2x +6

2x = -5

2x = -5

Divide by 2

x = -5/2

The x intercept for the function is ( -5/2, 0)

Hope this helps.

4 0
3 years ago
Read 2 more answers
A study published in Psychiatry Research states that 62% of autistic children are left-handed.[12]
nordsb [41]

Answer:

The pvalue of the test is 0.7188 > 0.05, which means that there is not enough statistical evidence based on the sample to dispute the results of the study published in Psychiatry Research.

Step-by-step explanation:

Test if there is enough statistical evidence based on the sample to dispute the results of the study published in Psychiatry Research:

This means that at the null hypothesis we test if the proportion is 62%, that is:

H_0: p = 0.62

At the alternate hypothesis, we test if the proportion is different from 0.62, that is:

H_a: p \neq 0.62

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample

62% is tested at the null hypothesis:

This means that \mu = 0.62, \sigma = \sqrt{0.62*0.38}

When a random sample of 26 autistic children were observed, 17 were found to be left-handed.

This means that n = 26, X = \frac{17}{26} = 0.6538

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.6538 - 0.62}{\frac{\sqrt{0.62*0.38}}{\sqrt{26}}}

z = 0.36

Pvalue of test and decision:

The pvalue of the test is the probability of a proportion that differs from the mean by at least 0.6538 - 0.62 = 0.0338, which is P(|z| > 0.36), which is two multiplied by the pvalue of z = -0.36

Looking at the z-table, z = -0.36 has a pvalue of 0.3594

2*0.3594 = 0.7188

The pvalue of the test is 0.7188 > 0.05, which means that there is not enough statistical evidence based on the sample to dispute the results of the study published in Psychiatry Research.

4 0
2 years ago
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