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Whitepunk [10]
3 years ago
7

Determine the total cost or selling price to the nearest cent $65 video game ; 25% discount?

Mathematics
1 answer:
kodGreya [7K]3 years ago
6 0

Answer:

48.75$

Step-by-step explanation:

the difference is  about 16.25$

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Which equation represents a line that has the slope 1/3 and passes through the point (-2,1)
goldenfox [79]

Answer:

y - 1 = (1/3)(x + 2)

Step-by-step explanation:

Here m = 1/3 and (-2, 1) is a point on the line.  The appropriate equation is

y - k = m(x - h), where (h, k) is the pt on the line.

Subbing the known values, we get:

y - 1 = (1/3)(x + 2)

3 0
3 years ago
Complete parts ​(a) through ​(c) below. ​(a) Determine the critical​ value(s) for a​ right-tailed test of a population mean at t
olga_2 [115]

Answer:

a) The critical value on this case would be t_{crit}=1.325

b) The critical value on this case would be t_{crit}=-1.345

c) The critical values on this case would be t_{crit}=\pm 2.201

Step-by-step explanation:

Part a

The system of hypothesis on this case would be:

Null hypothesis: \mu \leq \mu_0

Alternative hypothesis: \mu > \mu_0

Where \mu_0 is the value that we want to test.

In order to find the critical value we need to find first the degrees of freedom, on this case that is given df=20. Since its an upper tailed test we need to find a value a such that:

P(t_{20}>a) = 0.1

And we can use excel in order to find this value with this function: "=T.INV(0.9,20)". The 0.9 is because we have 0.9 of the area on the left tail and 0.1 on the right.

The critical value on this case would be t_{crit}=1.325

Part b

The system of hypothesis on this case would be:

Null hypothesis: \mu \geq \mu_0

Alternative hypothesis: \mu < \mu_0

Where \mu_0 is the value that we want to test.

In order to find the critical value we need to find first the degrees of freedom, given by:

df=n-1=15-1=14

Since its an lower tailed test we need to find b value a such that:

P(t_{14}

And we can use excel in order to find this value with this function: "=T.INV(0.1,14)". The 0.1 is because we have 0.1 of the area accumulated on the left of the distribution.

The critical value on this case would be t_{crit}=-1.345

Part c

The system of hypothesis on this case would be:

Null hypothesis: \mu = \mu_0

Alternative hypothesis: \mu \neq \mu_0

Where \mu_0 is the value that we want to test.

In order to find the critical value we need to find first the degrees of freedom, given by:

df=n-1=12-1=11

Since its a two tailed test we need to find c value a such that:

P(t_{11}>c) = 0.025 or P(t_{11}

And we can use excel in order to find this value with this function: "=T.INV(0.025,11)". The 0.025 is because we have 0.025 of the area on each tail.

The critical values on this case would be t_{crit}=\pm 2.201

5 0
3 years ago
Debbie is n years old. Shawn is twice as old as Debbie and Edna is 3 years older than Debbie. The expression n + 2n + n + 3 give
ohaa [14]

Answer:

4n + 3

Step-by-step explanation:

8 0
3 years ago
Solve 4x-c=k for x ?
Musya8 [376]

Answer: x=k+c/4

Step-by-step explanation:

4x-c=k

<u>Add c to both sides.</u>

4x=k+c

<u>Divide both sides by 4.</u>

x=k+c/4

Hope this helps, HAVE A BLESSED AND WONDERFUL DAY! As well as a great Superbowl Weekend! :-)

- Cutiepatutie ☺❀❤

5 0
3 years ago
Read 2 more answers
8÷–4×(–7––2)=?<br> OM god guys I need help on this one! This is urgent!! pls hurry up!!
Bad White [126]

Answer:

It equals 2/5x or 10x

Step-by-step explanation:

Hope this helps

8 0
3 years ago
Read 2 more answers
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