At the Shake Shack two orders of fries

Heeeeeeeellllllllpppppppppp

julia-pushkina [17]

Answer:

False

Step-by-step explanation:

To be a function each x can only go to one y

The number 5 goes to both 2 and 1, which violates the rule

Therefore, this is a relation, not a function

3 0

3 years ago

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

antiseptic1488 [7]

Answer:

The 95% confidence interval for the mean number of words a third grader can read per minute is (23.8, 24.4).

Step-by-step explanation:

We have 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 Z-table as such z has a p-value of $1 - \alpha$ .

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

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96\frac{3.7}{\sqrt{582}} = 0.3$

The lower end of the interval is the sample mean subtracted by M. So it is 24.1 - 0.3 = 23.8

The upper end of the interval is the sample mean added to M. So it is 24.1 + 0.3 = 24.4.

The 95% confidence interval for the mean number of words a third grader can read per minute is (23.8, 24.4).

5 0

3 years ago

Katie has read 32% of a book. if she has read 80 pages, how many more pages does Katie have left to read?

Blababa [14]

Katie has read 32%, so 32%=80 pages. To get the total number of pages, you have to divide 32 and 80 by 8 to get 4% and 10 pages. 4% of the book is 10 pages, and in order to get 100%, you have to multiply by 25(4*25=100) on both sides. Remember, what you do to one side, you do to the other side. That leaves you with 100% and 250 pages. The book is 250 pages long. If she has read 80 pages, you subtract 80 from 250 to find how many pages she has left to read. The difference is 170. Katie has 170 pages left to read.

5 0

3 years ago

What is the area of the real object that the scale drawing models?

Kruka [31]

Answer:

HOPE THIS HELPS!!

Step-by-step explanation:

YOU could find it by doing these steps:

Atual Area = �� square units.

Scale Drawing Area = �� square units.

Value of the Ratio of the Scale Drawing Area to the Actual Area:

7 0

3 years ago

What is the solution to the system of equations?

Savatey [412]

Answer:

The solution of the system of equations is (4 , 2) ⇒ 1st answer

Step-by-step explanation:

* Lets explain how to solve the system of equations

- In the system of equations there are two equations in two variable

x and y

- There are two ways to solve them:

# Substitution method: substitute one variable from one equation

into the other equation, so the equation will have one variable so

we can solve it

# Elimination method: we try to eliminate on variable from both

equation by addition or subtraction to get one equation in one

variable so we can solve it

* Lets solve the problem

∵ The system of equations has:

x + y = 6 ⇒ (1)

x = y + 2 ⇒ (2)

- We will use the substitution method because the second equation

is x in terms of y

- Substitute equation (2) in equation (1)

- That mean replace x by y + 2

∵ (y + 2) + y = 6

- Add the like terms in the left hand side

∴ (y + y) + 2 = 6

∴ 2y + 2 = 6

- Subtract 2 from both sides

∴ 2y = 4

- Divide both sides by 4

∴ y = 2

- Now substitute the value of y in equation (2)

∵ x = y + 2 ⇒ (2)

∴ x = 2 + 2 = 4

∴ x = 4

∴ The solution of the system of equations is (4 , 2)

7 0

3 years ago