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3 years ago

Please help i will mark branliest

Mathematics

1 answer:

konstantin123 [22]3 years ago

7 0

Answer:

Step-by-step explanation:

The range is the difference between the largest and smallest values.

range = 9 - 2 = 7

If 2 is replaced by 3 then 3 becomes the smallest value and

range = 9 - 3 = 6

That is the range decreases by 1

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A researcher at a school of nursing decides to investigate the correlation between a pre- admission HESI examination, high schoo

Nataly_w [17]

Answer: D. Predictive validity

Step-by-step explanation: Predictive validity can be explained as a method of determining the degree or level of correctness of a prediction using pre-existing information or data and values obtained from the actual measurement.

In the scenario above, the researchers investigates the correlation or relationship between the predicted value obtained using a pre- admission HESI examination, high school GPA, and SAT scores and the actual grade received upon completion of the first year. This process is to analyze or determine the validity of our prediction.

4 0

3 years ago

Ivian scores 58 out of 80 marks in a maths test what is his score as a percentage

vagabundo [1.1K]

Answer:

72.5%

Step-by-step explanation:

- If we covert our fraction it should equal to 72.5

-Hoped I helped-

Sleepy-

8 0

3 years ago

PLEASE HELP ASAP GIVING BRAINLIEST

Lady_Fox [76]

Answer:

Part 1) $y=32.5x+11.95$

Par 2) see the explanation

Part 3) $\$401.95$

Step-by-step explanation:

Part 1) Write an equation in slope intercept form to represent this problem

Let

x ----> the number of tickets

y ---> the total cost

The linear equation in slope intercept form is equal to

$y=mx+b$

where

m is the slope or unit rate

b is the y-intercept (one-time processing fee)

In this problem we have

$b=\$11.95$

ordered pairs (4,141.95) and (7,239.45)

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute the values in the formula

$m=\frac{239.45-141.95}{7-4}$

$m=\frac{97.5}{3}$

$m=32.5$

substitute the values in the linear equation

$y=32.5x+11.95$

Part 2) What does your slope represent in this problem? What does your y-intercept represent in this problem?

a) The slope of the linear equation represent the unit rate, so the slope represents the cost of one ticket

$m=\$32.5\ per\ ticket$

b) The y-intercept is the value of y when the value of x is equal to zero

In this context, the y-intercept represent the one-time processing fee

$b=\$11.95$

Part 3) Use the equation to find how much Alan would have to pay for 12 tickets

For x=12 tickets

substitute in the linear equation

$y=32.5(12)+11.95$

$y=\$401.95$

3 0

4 years ago

What polynomial should be subtracted from 7x2−6x+5 to get the difference equal to x2−x.

Aliun [14]

Answer:

6x^2-5x+5

Step-by-step explanation:

4 0

3 years ago

You're at a halloween fair with a big ferris wheel. the wheel has ten chairs and people are seated two per chair. every minute a

miskamm [114]

The number of people who took ride in the big ferris wheel at a fair can be calculated by proper dimensional analysis. This can be done through the equation below,

n = (number of minutes)(rate at which the chair passes the exit platform)(number of persons per chair)

Substituting the known values to the equation,

n = (30 minutes)(1 chair / minute)(2 persons / chair)
n = 60 persons

Answer: 60 persons

8 0

4 years ago

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