HELP PLS 100PTS!!! Evaluate s(-19) s(n)=7-4n

Mathematics

2 answers:

Len [333]3 years ago

5 0

Answer: Therefore, the recursive formular is A(n) = A(n - 1) + 9

Step-by-step explanation: (n) = 2 + 9(n - 1) = 2 + 9n - 9

(n + 1) = 2 + 9(n + 1 - 1) = 2 + 9n = (2 + 9n - 9) + 9 = A(n) + 9

Alika [10]3 years ago

4 0

S(-19)=7-4(-19)
In this step, I inserted the value into the equation.
Next, evaluate.
s(-19)=83
(Multiply the -4 times -19, which gives 76, then add the 7, which gives 83)
Hope this helps!!

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The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

Korolek [52]

Answer:

A sample of 499 is needed.

Step-by-step explanation:

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In which

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$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In this question, we have that:

$\pi = 0.21$

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We need a sample of n, which is found when $M = 0.03$ . So