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3 years ago

Figure b is a scaled copy of figure a. help?

Mathematics

1 answer:

Natalka [10]3 years ago

4 0

The scale factor is 4 because if you multiply 4 to all the number on figure A it will equal to figure Bs numbers(sorry if it doesn’t makes sense)

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Complete parts (a) through (c) below.

Yuki888 [10]

Answer:

a) $t_{crit}= 1.34$

b) $t_{crit}=-2.539$

c) $t_{crit}=\pm 2.228$

Step-by-step explanation:

Part a

The significance level given is $\alpha=0.1$ and the degrees of freedom are given by:

$df = n-1= 15$

Since we are conducting a right tailed test we need to find a critical value on the t distirbution who accumulates 0.1 of the area in the right and we got:

$t_{crit}= 1.34$

Part b

The significance level given is $\alpha=0.01$ and the degrees of freedom are given by:

$df = n-1= 20-1=19$

Since we are conducting a left tailed test we need to find a critical value on the t distirbution who accumulates 0.01 of the area in the left and we got:

$t_{crit}=-2.539$

Part c

The significance level given is $\alpha=0.05$ and $\alpha/2 =0.025$ and the degrees of freedom are given by:

$df = n-1= 11-1=10$

Since we are conducting a two tailed test we need to find a critical value on the t distirbution who accumulates 0.025 of the area on each tail and we got:

$t_{crit}=\pm 2.228$

4 0

3 years ago

How do I do pre-Algebra???

Lana71 [14]

Hey there!

The main concept of pre-algebra is solving equations for variables in them.

For example, let's say you have the algebraic equation below.

x+1=3

With algebra, you need to figure what x is equal to. To do so, you will use inverse operations on both sides of the equation to isolate x one side, showing what it is equal to.

We would subtract 1 to both sides to isolate x on one side.

x+1-1=3-1

As you can see, +1-1=0, therefore, this would give us x+0, or just x. Now it is isolated and will show us what it is equal to.

x=3-1

x=2

Therefore, in our equation x+1=3, x would be equal to 2.

I hope this explanation helps! Have a great time here at Brainly!

7 0

3 years ago

To raise funds, a school sells raffle tickets to parents and students. The parent tickets cost $6 each and the student tickets c

masya89 [10]

Answer: 312 students purchased a ticket

Step-by-step explanation:

Let x represent the number of raffle tickets sold to parents.

Let y represent the number of raffle tickets sold to students.

The school sold 371 tickets. This means that

x + y = 371

x = 371 - y

The parent tickets cost $6 each and the student tickets cost $1.50 each and the school raised a total of $822. This means that

6x + 1.5y = 822 - - - - - - - -1

Substituting x = 371 - y into equation 1, it becomes

6(371 - y) + 1.5y = 822

2226 - 6y + 1.5y = 822

- 6y + 1.5y = 822 - 2226

- 4.5y = - 1404

y = -1404/-4.5

y = 312

x = 371 - y

x = 371 - 312

x = 59

7 0

2 years ago

Does One-half hour equals , 2 one quarter hours

Ghella [55]

Half an hour= two quarters of an hour

7 0

2 years ago

Will give brainliest. A farmer is painting a new barn. He will need to calculate the surface area of the barn to purchase the co

Maslowich

Answer:

yd^2

Step-by-step explanation:

I took the test :)

6 0

3 years ago