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love history [14]
2 years ago
9

Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest

Mathematics
1 answer:
Advocard [28]2 years ago
7 0

Answer:

-21

28

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

 4 * x = 16 * 7

 x = 4 * 7

 x = 28

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I dont really know best of luck tho

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3 years ago
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natulia [17]

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Step-by-step explanation:

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3 years ago
The n candidates for a job have been ranked 1, 2, 3,…, n. Let X 5 the rank of a randomly selected candidate, so that X has pmf p
Anon25 [30]

Answer:

A. E(x) = 1/n×n(n+1)/2

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3 0
3 years ago
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Fiesta28 [93]
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8 0
3 years ago
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Lina20 [59]

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4 0
3 years ago
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