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3 years ago

11

music store bought a CD set at a cost of $10. When the store sold the CD set, the percent markup was 10%. Find the selling pr

ice

1 answer:

dolphi86 [110]3 years ago

7 0

Answer:

11

Step-by-step explanation:

10 percent of 10 is 1 so add that to 10 and you have your price

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A carpenter is making doors that are 20582058 millimeters tall. If the doors are too long they must be trimmed, and if they are

melamori03 [73]

Answer:

Z= 0.253

Z∝/2 = ± 1.96

Step-by-step explanation:

Formulate the null and alternative hypotheses as

H0 : u1= u2 against Ha : u1≠ u2 This is a two sided test

Here ∝= 0.005

For alpha by 2 for a two tailed test Z∝/2 = ± 1.96

Standard deviation = s= 15

n= 10

The test statistic used here is

Z = x- x`/ s/√n

Z= 2058- 2046 / 15 / √10

Z= 0.253

Since the calculated value of Z= 0.253 falls in the critical region we reject the null hypothesis.

There is evidence at the 0.05 level that the doors are too short and unusable.

7 0

3 years ago

If x has a mean of 17.2 g and a standard division of 14.0 g and y has a mean of 23.5 g and a standard division of 16.4 g and the

dimulka [17.4K]

The least squares regression line is y=0.6831x+11.25

Step-by-step explanation:

LSRL is the the Least Squares Regression Line.The formula for regression line is y=mx+b where m is the slope of the line and b is the y-intercept value of the line.

First find the slope, m of the line from the means and standard deviations given

x has a mean of 17.2 g and a standard deviation of 14.0 g

y has a mean of 23.5 g and a standard deviation of 16.4 g

The correlation coefficient in both cases is 0.83, hence the slope m is given by;

m=r(Sy/Sx) where m is the slope of the line, Sy is standard deviation of y values, Sx is standard deviation of x values and r is the correction coefficient.

m= 0.5 * 23.5/17.2 =0.6831

Find the value of b, the y-intercept

b=Y-mX where X and Y are the mean values for x and y respectively

b=23.5-0.6831*17.2

b=23.5-11.75=11.25

The LSRL is y=0.6831x+11.25

Learn More

Least Squares regression Line : brainly.com/question/4090838

Keyword : standard deviation, least square regression line

#LearnwithBrainly

3 0

3 years ago

The ac is a leg of the right triangle <br> True <br> False

Vinil7 [7]

Answer:

False

Step-by-step:

The hypotenuse of the triangle is the side opposite to the right angle. The legs are the other two sides of the triangle. Since AC is on the opposite side of the right angle, it is the hypotenuse and therefore not a leg. Hope this helps!

3 0

3 years ago

laiz [17]

YOU USE 1 7/8
<span>red paint and blue paint</span>

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4 years ago

PLZ HELP ME IM GOING TO FAIL THEN PLZ A cyclist cycles a distance of 48 miles in a time of 3 hours.

Pani-rosa [81]

Answer:

her average speed is 16 miles per hour

Step-by-step explanation:

do 48 divided by 3 = 16

8 0

3 years ago

Read 2 more answers