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3 years ago

Please help me I don’t get this?

Mathematics

2 answers:

Gekata [30.6K]3 years ago

8 0

Answer:

Step-by-step explanation:

ok so the domain is the 1st number in a set of coordinates and the range is the 2nd number in a set of coordinates. the domains are (-1,1,2,4) and the ranges are (-2,1,3,-2). this is a function because each domain has exactly one range.

Marysya12 [62]3 years ago

7 0

Answer:

Domain: (-1, 1, 2, 4)

Range: (-2, 1, 3, -2)

Step-by-step explanation:

Domain is all Y values (the #'s that run up & down), & Range is all X values (the #'s that run left & right). All X values to the left, are negative #'s. And all Y values to the right, are positive. All Y values that go up, are Positive. And all Y values that go down the line, are negative. Write the domain & range in the same order.

To check if it's a function:

Inspect the graph to see if any vertical line drawn would intersect the curve more than once.

If there is any such line, the graph does not represent a function.

If no vertical line can intersect the curve more than once, the graph does represent a function.

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What is the expected value for the following probability distribution?

dolphi86 [110]

To calculate the expected value of our dataset, first we need to find the missing probability. The sum of the probabilities of all outcomes must add up to 1

$\sum P(X)=1$

Therefore, 1 minus all the other probability values is going to be P(2).

$1-(0.04+0.05+0.2+0.1)=1-0.75=0.25$

The expected value is given by the sum of every value of the dataset multiplied by its respective probability

$E[X\rbrack=\sum P(x_i)x_i$

Using this formula in our problem, we have:

$\begin{gathered} E[X\rbrack=\sum_{i\mathop{=}1}^5P_i(x_i)x_i \\ =(0.4)\times(0)+(0.05)\times(1)+(0.25)\times(2)+(0.2)\times(3)+(0.1)\times(4) \\ =0+0.05+0.5+0.6+0.4 \\ =1.55 \end{gathered}$

The expected value of this dataset is 1.55.

5 0

1 year ago

35 points !!!<br> Math test due very soon

jok3333 [9.3K]

The answer to ur question is c (i think)

8 0

3 years ago

Which of the following expressions are equivalent

wel

A because
-2/5 x 12 = -45/5
And 2x (-12/5) is also equals to -45/5

3 0

4 years ago

How do I solve this?

diamong [38]

$\bf 8m + 95 < -87m+5\implies 95m+95$

3 0

3 years ago

PLEASE HELP ASAP……..

bogdanovich [222]

Answer:

4x+2y = 14 The original equation

2y = 14-4x Subtract 4x from both sides

2y = -4x+14 Rearrange so x is first

y = -2x+7 Divide everything by 2

Explanation:

The steps above practically explain everything needed, so there's not much to add. The standard form is Ax+By = C while slope intercept form is y = mx+b

In the case of y = -2x+7, we have a slope of m = -2 and y intercept of b = 7. This means (0,7) is one point on the line. Use the slope to move down two and to the right one unit to arrive at (1, 5) as another point on this line.

7 0

2 years ago