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Darya [45]
3 years ago
11

Which of the following statements are true? check all that apply.

Mathematics
1 answer:
Margaret [11]3 years ago
5 0

<u>Answer:</u>

1 and 5 are correct.

<u>Step-by-step explanation:</u>

1. The mean is affected by outliers.  - TRUE

(the mean is the average so each of its values affect it.)

2. The mean is always a more accurate measure of center than the median. - FALSE

(the mean gives a better idea of the values while the the central values for normal distributions are described using the median value.)

3. Removing an outlier from a data set will cause the standard deviation to increase. - FALSE

(it makes the data set more normal by reducing the standard deviation, not increasing it. )

4. If the data set’s distribution is skewed, then 95%of its values will fall between two standard deviations of the mean. - FALSE

(the 68-95-99.9 rule works for the normal distribution, but the skewed distribution.)

5. If a data set’s distribution to skewed to the right, its mean will be larger than its median. - TRUE

(the mean is always pulled towards the direction of the skewness.)

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NEED HELP PLEASE ALSO I NEED EXPLANATIONS TO THESE PROBLEMS I WILL MARK BRAINLIEST.
Molodets [167]

Answer:

a) to determine how much Carl gets per hour, divide earnings by hours.

45 / 3 = 15

$15 per hour

b) Carl earns more per hour, because 15 is greater than 12.

3 0
3 years ago
If using the method of completing the square to solve the quadratic equation
zheka24 [161]

Answer: 25

Step-by-step explanation: The number that is added to both sides is the number that is needed to create a perfect square trinomial.

The question is, what is that number?

Well, it comes from a formula. The number that is added to both sides always comes from half the coefficient of the middle term squared.

So half of -10 squared or -5 squared which is 25.

So 25 is added to both sides.

8 0
3 years ago
Name the place value to which each number was rounded<br> 7.429 to 7.4
alexgriva [62]

Answer:

tenths place

Step-by-step explanation:

1/10=0.1 ==> one-<u><em>tenth</em></u>

4 0
1 year ago
-4/9f = -3<br><br>Solve for F​
mars1129 [50]

Answer:

<h2><u><em>f = 27/4</em></u></h2>

Step-by-step explanation:

in the picture

8 0
2 years ago
Read 2 more answers
Craig has a building block in the shape of a rectangular pyramid. A net of which is shown below.
Alex787 [66]

Answer:

the answer is D: 294 sq. cm

Step-by-step explanation:

first you want to split the net into 4 triangles and 1 rectangle

a = 12 cm

b =  6 cm

d = 13 cm

calculate the surface area of the pyramid...

1st find the area of the rectangle base

Rectangle base area

b x a = (6 cm) (12 cm)

= 72 sq. cm

next find the area of the triangle on the left

Left triangle

1/2(b)(d) = 1/2 (6 cm)(13 cm)

= 1/2 (78 sq cm)

= 39 sq. cm

Since all the triangles are congruent (same), you will need to multiply by 2 to get the combined area of the triangle on the left and on the right.

Area of left & right triangles

= 2 (39 sq. cm)

= 78 sq. cm

Find the area of the triangle on the bottom

Bottom triangle area = 1/2 (a)(a)

= 1/2 (12 cm) (12 cm)

= 1/2 (144 sq. cm)

= 72 sq. cm

Since the bottom of the triangle is congruent to the top triangle, multiply that by 2 to get a combined area of the triangle on the bottom and top

Area of top & bottom triangles

2 (72 sq. cm) = 144 sq. cm

Finally...add the area of the 4 triangles to the area of the rectangular base

72 + 78 + 144 = 294 sq. cm

3 0
3 years ago
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