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3 years ago

QUADRATIC EQUATION â€" WORD PROBLEMS

Mathematics

1 answer:

dusya [7]3 years ago

4 0

Answer: -7, 12

Step-by-step explanation:

a+b = 5

a*b = -84

a = 5-b

(5-b)*b = -84

-b^2 + 5b + 84 = 0

(-b - 7)(b + 12) = 0

The roots are -7 and 12.

I'm not sure what â€" stands for

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Answer:

Mean = 20

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Step-by-step explanation:

Solution:-

- Let X be the number of customers paying with a debit card. X has the binomial distribution with n = 100 trials and success probability p = 0.2

- In general, if X has the binomial distribution with (n) trials and a success probability of (p) then:

P[X = x] = n!/(x!(n-x)!) * p^x * (1-p)^(n-x)

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- The probability mass function is derived by looking at the number of combination of x objects chosen from n objects and then a total of x success and n - x failures.

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- The mean of the binomial distribution is n * p = 20

- The variance of the binomial distribution is n * p * (1 - p) = 16

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3 years ago

You want to be able to withdraw $25,000 from your account each year for 20 years after you retire.

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Answer:

When using formulas in application, or memorizing them for tests, it is helpful to note the similarities and differences in the formulas so you don’t mix them up. Compare the formulas for savings annuities vs payout annuities.

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(

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3 years ago

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soldi70 [24.7K]

Answer:

I think it's c tell me it i'm wrong

Step-by-step explanation:

they both have and so it would be times

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Read 2 more answers

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kondor19780726 [428]

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