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zepelin [54]
3 years ago
14

Today everything at a store is on sale The store offers a 20% discount The regular price of a tshirt is 18$ what is the discount

price
Mathematics
1 answer:
kirill [66]3 years ago
6 0
The discounted price is $14.40. Hope this helped.
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Find s(20) for the sequence s(n)=5n-2,ne {1 2, 3,... }
zavuch27 [327]

Answer:

Step-by-step explanation:

c

S(20)=

5*20-2=100-2=98

3 0
3 years ago
Exam pls help 34 points
FrozenT [24]

Answer:

it would be 4/20 I thinkk

Step-by-step explanation:

4 0
3 years ago
Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a
Natasha_Volkova [10]

Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 25 - 1 = 24

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 2.064

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.064\frac{10.2}{\sqrt{25}} = 4.21

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 81.5 - 4.21 = 77.29

The upper end of the interval is the sample mean added to M. So it is 81.5 + 4.21 = 85.71.

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

6 0
3 years ago
Simplify by distributing: 3(x + 4)
larisa86 [58]

Answer:

3x+12

Step-by-step explanation:

distribute

7 0
3 years ago
What is the lowest term for 10/12
Studentka2010 [4]

Answer:

5/6

Step-by-step explanation:

Find the lowest common denominator between the 10 and 12.

10 and 12 have the lowest common denominator of 2

10/2=5

12/2=6

So 5/6 is the lowest term of 10/12

3 0
3 years ago
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