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3 years ago

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19. Suppose 3 marbles are drawn without replacement from a bag containing 3 yellow and 4 white marbles. (a) Draw a histogram for

the number of yellow marbles in the sample. (b) What is the expected number of yellow marbles in the sample?

1 answer:

Alina [70]3 years ago

7 0

Answer:

(a) see attachment

(b) E(x) = 226/105

Step-by-step explanation: see attachment

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Gus spends 12% of his monthly income on entertainment. He constructs a circle graph to illustrate his budget. What is the degree

Lapatulllka [165]

Answer:

43.2°

Step-by-step explanation:

Just multiply .12 by 360° (the number of degrees in a circle), this will give you the central angle.

Multiplying the decimal means your finding 12.% of 360°

So the angle is 43.2° degrees

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3 years ago

In trapezoid WXYZ, identify WX. PLEASE HELP!!!

matrenka [14]

Answer:

The length of WX is 31 units.(third option)

Step-by-step explanation:

Given that In trapezoid WXYZ, WX║ZY and S and T are the mid points of the sides WZ and XY. We have to find the length of WX.

By trapezoid mid-segment Property,

A mid-segment of a trapezoid join the midpoints of the two non-parallel sides of trapezoid. The length of the mid-segment is the average of the lengths of the two bases and is parallel to the bases of the trapezoid.

∴ $ST=\frac{WX+ZY}{2}$

⇒ $48=\frac{WX+65}{2}$

⇒ $96=WX+65$

⇒ $WX=96-65=31$

The length of WX is 31 units.(third option)

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3 years ago

What does -2/3 (x + 5) + 4 (x + 5) - 10/3 (x + 5) equal

Kitty [74]

Answer: 0

Step-by-step explanation:

$-\frac{2}{3}(x+5)+4(x+5)-\frac{10}{3}(x+5) = ?$

$-\frac{2}{3}x-\frac{10}{3}x+4x+20-\frac{10}{3}x-\frac{50}{3} = ?$

$(-\frac{2}{3}x+4x -\frac{10}{3}x) +(-\frac{10}{3}+20-\frac{50}{3})=?$

$(-\frac{12}{3}x+4x)+(-\frac{60}{3}+20)=?\\ (-4x+4x)+(-20+20)=?\\0+0=0$

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3 years ago

Students in a school were asked to collect old bottles as part of a recycling drive. Some of the data recorded at the drive is s

Len [333]

Answer:

A. The number of students who collected exactly 2 bottles.

Step-by-step explanation: I got this question on my test, and the answer was A.

100% verified! :D

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3 years ago

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Which of the following can you use to find 20 percent of 48?

11Alexandr11 [23.1K]

Answer:

The answer would be B

Step-by-step explanation:

It would be B as if we do... 20/100 ⨉ 48, our process would be the same as 0.2(48)

=20% of 48

=20/100 ⨉ 48

=0.2 ⨉ 48

=9.6

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3 years ago

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