Is the relationship shown by the data linear? If so, model the data with an equation x: -7,-5,-3,-1 y: 5,9,13,17

Help please no links

andrezito [222]

Answer:

D

Step-by-step explanation:

The question states you need a square. That means whatever you do, must leave a square number like 49 or 64

If you add 6 or 7 to 56 you do not get 64 A and C are both wrong.

If you subtract 7 from 56 you get 49 which is a perfect square and all 4 sides will equal 7.

3 0

2 years ago

A training field is formed by joining a rectangle and two semicircles, as shown below. The rectangle is 98m long and 76m wide. F

Vsevolod [243]

Without the image, I assume the two semicircles are on each end of the rectangle.

Rectangle; A = lw
A = 98 x 76
A = 7,448 square meters

Put the two semicircles together to form a circle; A = π $2^{2}$
A = (3.14)( $76^{2}$ )
A = 3.14 x 76 = 5,776 square meters

7,448 + 5,776 = 13,224 square meters

5 0

2 years ago

X is normally distributed with a mean of 100 and a standard deviation of 15. What is the probability of randomly sampling a scor

VikaD [51]

Answer:

Using calculator: 0.0415

Using Z-score Table: 0.0418

Step-by-step explanation:

There are two ways you can solve this problem.

1. Use the normal distribution function on a calculator.

Entered values:

Lower Limit: 126

Upper Limit: 999999999999999... (To encompass all the data)

Standard Deviation: 15

Mean: 100

2. Find the Z score and look up probabilities on table.

Formula for Z score:

$Z=\frac{x-mean}{standard deviation} \\\\Z= \frac{126-100}{15}=1.7333...$

Z = 1.7333

This means that the value 126 is 1.733 standard deviations away from the mean. We can look this value up on the Z table to find its corresponding probability.

This will show us the probability of the random sampling being equal to or lower than 126.

P = 0.9582

So to find the probability of it being above, we simply just calculate the inverse as all probabilities on the curve = 1.

1-0.9582 = 0.0418

NOTE: Values found from the table will usually be a bit different from if you find it from a calculator, the one you need will depend on the method you use in class.

Hope this helped!

6 0

2 years ago

What is 41 divided by 4

geniusboy [140]

Answer:

10 with a remainder of 1

Step-by-step explanation:

and also, you should use a program like cymath for that. Only use brainly for problems that cant be answered by a website like that.

Good luck!

3 0

3 years ago

A landscape business charges $50 to deliver rocks. The cost of the rocks are $27 per cubic yard. write and solve a linear equati

Nuetrik [128]

<h2>Answer: 27x + 50 = y, $266</h2>

Step-by-step explanation:

First, let's form a linear equation that will help us find out how much that will cost.

Let's set x = the cubic yards of rocks delivered and y = total cost.

First, we know that the business charges 27 dollars for every x that you buy. That can be shown with a multiplication expression:

27x

Next, we know that the business charges a fixed fee of $50 for their services. This fee would be <em>added on</em> to the amount that they charge for the rocks that you buy.

That's our linear expression! Next, we need to find out the <em>total cost</em>, y, when you need 8 cubic yards of rocks delivered, x.

To solve this, we need to substitute values for at least one of our variables.

Since 8 describes the cubic yards of rocks delivered, we can substitute 8 for x.

But we don't know y, the total cost- that's what we're solving for! In other words, we're solving for y.

Let's just substitute in what we know:

27(8) + 50 = y.

216 + 50 = y

So, we know that it would cost $266 dollars to have 8 cubic yards of rocks delivered to a site.

By the way, you can also graph your linear equation to find the corresponding y-value to 8 as another way to solve your problem.

7 0

3 years ago