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Zarrin [17]
3 years ago
15

Suppose that the probabilities of a customer purchasing​ 0, 1, or 2 books at a book store are 0.20.2​, 0.20.2​, and 0.60.6​, res

pectively. what is the expected number of books a customer will​ purchase?
Mathematics
1 answer:
jarptica [38.1K]3 years ago
6 0

Form the sum of products of probability and number of books:

0.2×0 +0.2×1 +0.6×2 = 0 +.2 +1.2 = 1.4 books

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Step-by-step explanation:

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2 years ago
the probability of a basketball player hitting a foul shot is 1/3. how many shots would you expect her to make in 90 attempts?
Kaylis [27]
90 attempts are made and only one third are successful. Multiply the attempts by successes and you get 30 successful shots (90 x 1/3= 30).
8 0
2 years ago
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Write the Slope-Intercept and Point-Slope forms of the line passing through the point (-3, 2) and having a slope of -4/5
weeeeeb [17]

Answer:

slope-intercept: y=\frac{-4}{5} x-\frac{2}{5}

point-slope: y-2=\frac{-4}{5} (x+3)

Step-by-step explanation:

The slope-intercept form of a line is written as y = mx + b, where m is the slope and b is the y-intercept.

The point-slope form of a line is written as y - y1 = m(x - x1), where (x1, y1) is a given point and m is the slope.

Here, we see that the slope is -4/5, which means that m = -4/5. Since we're given a point (-3, 2), let's go ahead and just write the point-slope form already. (x1, y1) = (-3, 2) so x1 = -3 and y1 = 2. Then:

y - y1 = m(x - x1)

y - 2 = (-4/5) * (x + 3)

y-2=\frac{-4}{5} (x+3)

Now, we want to find the slope-intercept form, so we need to figure out the y-intercept. Well, first, let's plug in what we know:

y = mx + b

y = (-4/5)x + b

Any point on this line will satisfy the above equation. Since (-3, 2) is on this line, if we plug -3 in for x and 2 in for y, the equation should hold true, so we can solve for b:

y = (-4/5)x + b

2 = (-4/5) * (-3) + b

2 = 12/5 + b

b = -2/5

So, the y-intercept is -2/5. Then the slope-intercept form is:

y=\frac{-4}{5} x-\frac{2}{5}

Thus, our two equations are:

slope-intercept: y=\frac{-4}{5} x-\frac{2}{5}

point-slope: y-2=\frac{-4}{5} (x+3)

8 0
2 years ago
Someone please help me with this
Nadusha1986 [10]
Since 2 sides of the triangle are the same, it's an isosceles triangle.
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A triangle has 180 degrees total.

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Constant terms are numbers with NO variables!!!! So your constant term in this handy-dandy equation will be 17
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