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Kobotan [32]
1 year ago
15

The management of a department store is interested in estimating the difference between the mean credit purchases of customers u

sing the store's credit card versus those customers using a national major credit card. You are given the following information.
Store's Card Major Credit Card
Sample size 64 49
Sample mean $140 $125
Population standard deviation $10 $8


A point estimate for the difference between the means is:________

a. 18
b. 265
c. 15
d. 2
Mathematics
2 answers:
Tema [17]1 year ago
7 0
The answer is b. 265
mr Goodwill [35]1 year ago
5 0

Answer:

6

Step-by-step explanation:

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A train is traveling at a constant speed and has traveled 67.5 miles in the last 1 1/2 hours. Which equation shows the proportio
marishachu [46]

Answer:

The answer is B, d=45t

Step-by-step explanation:

i just did it and got it correct

hope it helps and good luck :)

8 0
1 year ago
Is the statement "Two matrices are row equivalent if they have the same number of rows" true or false? Explain. A. True, because
vlabodo [156]

Answer: The answer is (C).


Step-by-step explanation: The given statement is - "Two matrices are row equivalent if they have the same number of rows". We are to explain whether the statement is true or false.

What are row equivalent matrices? The answer to this question is -

Two matrices are said to be row equivalent if one of the matrices can be obtained from the other by applying a number of elementary row operations. Or, we can say two matrices of same order are row equivalent if they have same row space.

Thus, the correct option is (C).



7 0
2 years ago
Triangle JKL is equilateral. One side of the triangle, JL, is a diameter of circle M. Which is true about line segments JK and K
antoniya [11.8K]
It could be concluded that since line JL is a diameter of a circle, therefore, JK and KL are the tangents of the specific circle that JL is part of. By definition, a tangent is "a line that touches a curve at one point without touching it." Both these lines touches the edges of the circle M therefore they are tangents.
7 0
1 year ago
Read 2 more answers
Which of the following is the product of the rational expressions shown below x+2/x-4•3x/x+4
Doss [256]

Answer:

Final answer is \frac{3x^2+6x}{x^2-16}.

Step-by-step explanation:

Given rational expressions are \frac{x+2}{x-4} and \frac{3x}{x+4}.

Now we need to find about what is the product of given rational expressions.

to multiply the rational expressions, we simply multiply numerator with numerator. Then multiply denominator with denominator.

\frac{x+2}{x-4}\cdot\frac{3x}{x+4}

=\frac{\left(x+2\right)\cdot3x}{\left(x-4\right)\cdot\left(x+4\right)}

=\frac{3x^2+6x}{x^2+4x-4x-16}

=\frac{3x^2+6x}{x^2-16}

Hence final answer is \frac{3x^2+6x}{x^2-16}.

3 0
1 year ago
3 guys go into a hardware store, all looking to buy the same thing. William buys 1 for $1. Billy buys 99 for $2. Finally, Willie
jeka57 [31]

billy were buing gum

Step-by-step explanation:

7 0
1 year ago
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