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NeX [460]
2 years ago
13

The average test scores in a physics class is normally distributed with a standard deviation of 5.4. 50 scores with a sample mea

n of 79 were selected at random.
(a) Find a 95% confidence interval for the population mean test score.

(b) What is the value of the margin of error?
Mathematics
1 answer:
andrey2020 [161]2 years ago
6 0

Answer:

to my knowledge

this question is gigantic

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Meiling needs 5 dollars 35 cents to buy a ticket to a show. In her wallet, she finds 2 dollar bills, 11 dimes, and 5 pennies. Ho
Llana [10]

Answer:

no she needs $2.20 more

Step-by-step explanation:

2+ 1.10+.05= $3.15

$5.35 - $3.15 = the answer

5 0
2 years ago
Two planes that have a line in common are called
natima [27]

Answer:

they would be intersecting lines

Step-by-step explanation:

brainly crown apricated if I'm right

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3 years ago
Solve each equation 3x+2(5x-3)=7
Sloan [31]

Answer:

1

Step-by-step explanation:

Step 1:

3x + 2 ( 5x - 3 ) = 7

Step 2:

3x + 10x - 6 = 7

Step 3:

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Step 4:

13x = 13

Answer:

x = 1

Hope This Helps :)

7 0
2 years ago
Which of the following trigonometric fuuctions has a range of apply all real numbers? Select all that apply.
Kryger [21]

Answer:

y=tan x and y=cotx

Step-by-step explanation:

We are given functions of all trignometric ratios and asked to find out which has range of all real numbers.  Let us discuss one by one

1. y =sinx:  False because -1≤sinx≤1 always

2. y=cosx:False because -1≤cosx≤1 always

3. y = tanx:  True because tanx can take any value

4. y=cot x: True because cots x can take any value

5. y = csc x:   False because this range does not lie between -1 and 1

6. y=sec xFalse because this range does not lie between -1 and 1

6 0
2 years ago
Explain why it is necessary to rename 4 1/4 if you subtract 3/4 from it.
WITCHER [35]
In order to add or subtract fractions, they must have a common denominator. I hope I answered your question.
3 0
3 years ago
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