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inysia [295]
3 years ago
12

To test upper h 0 : mu equals 72 versus upper h 1 : mu less than 72​, a simple random sample of size nequals20 is obtained from

a population that is known to be normally​ distributed, and the sample standard deviation is found to be 6. complete parts ​(a) and ​(b) below.
Mathematics
1 answer:
katen-ka-za [31]3 years ago
6 0
We solve using equation \beta   \sqrt{x}  \sqrt[n]{x}  \lim_{n \to \infty} a_n  \alpha⇔ ∈ ω. ㏒
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The x-intercept of the line whose equation is 2x - 3y= 6 is
QveST [7]
The x-intercept is 3 and the y-intercept is -2
4 0
3 years ago
Read 2 more answers
jamerra received a $3,00 car loan. she plans on paying off the loan in 2 years. at the end of 2 years, jamerra will have paid $4
leonid [27]

The rate of interest is 75 % per year

<em><u>Solution:</u></em>

Given that, Jamerra received a $3,00 car loan

she plans on paying off the loan in 2 years

<em><u>Jamerra will have paid $450 in interest</u></em>

Therefore, we get

Principal = $ 300

Number of years = 2

Simple Interest = $ 450

Rate of interest = ?

<em><u>The simple interest is given by formula:</u></em>

simple\ Interest = \frac{p \times n \times r}{100}

Where,

"p" is the principal and "n" is the number of years and "r" is the rate of Interest

<em><u>Substituting the given values we get,</u></em>

450 = \frac{300 \times 2 \times r}{100}\\\\450 = 3 \times 2 \times r\\\\6r = 450\\\\r = \frac{450}{6}\\\\r = 75

Thus rate of interest is 75 % per year

5 0
3 years ago
Solve 3(4m - 6) = 12 and explain each step
Studentka2010 [4]
Distribute the 3 to 4m and 6. this makes 12m-18=12
now add 18 to both sides.
12m=30
now divide by 12
m=30/12
3 0
3 years ago
Solve: 12 dogs decreased by 25% step by step pls.
Annette [7]
Decreased by 25%
find 25% of 12 and decrease 12 by it

percent means parts out of 100
25%=25/100=1/4
'of' means multiply
25% of 12=1/4 times 12=3

decrease 12 by 3
12-3=9

answer is 9
8 0
3 years ago
Read 2 more answers
state which basic Property of addition or multiplication justifies truth of the mathematical expressions 0+7y+2=7y+2
dlinn [17]
The given equation is:

0 + 7y + 2 = 7y + 2

This equation is showing that addition of 0 leaves the expression unchanged. 0 is known as the Additive Identity this means if we add or subtract 0 from any expression, number or equation the result won't be changed.

Therefore, the equation satisfied the property of Additive Identity of Real Numbers.  
8 0
3 years ago
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