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Mandarinka [93]

2 years ago

15

Subtracting 5 from each score in a distribution with a mean equal to 40 and a standard deviation equal to 3 will result in a sta

ndard deviation equal to:

1 answer:

LenaWriter [7]2 years ago

6 0

Adding or subtracting a constant from each value of a distribution changes the mean, but not the standard deviation.

The standard deviation will equal 3.

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The discriminant of the quadratic equation 2x2 - 4x + 3 = 0 is

inna [77]

Answer:

(A) -8

Step-by-step explanation:

∆=b^2 -4ac= (-4)^2-4(2)(3)= -8

Since discriminant<0, then the equation has no roots.

6 0

2 years ago

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What scale factor did Dionne use? 1/2 , 2/3 , 3/2 , 2

aleksandr82 [10.1K]

Answer:

$\frac{2}{3}$

Step-by-step explanation:

Calculate the scale factor, using the ratio of corresponding sides, image to original.

Using the vertical line image = 4 and original = 6 , then

scale factor = $\frac{4}{6}$ = $\frac{2}{3}$

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2 years ago

Use any model to solve the story problem. A single board is 1/12 meter thick. How many boards are there in a stack of boards tha

Colt1911 [192]

If a single board measures 1/12 of a meter then it would take 12 boards to make a meter. Since, the stack is 2 meters high. You would multiply 12 and 2 to get 24. There is 24 boards in the stack.

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3 years ago

What is the image of point (4, 5) after a counterclockwise rotation of 270º about the origin?

tia_tia [17]

The answer is (5, -4).

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3 years ago

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2 years ago