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3 years ago

If f(x) =x-1, what is f(9)

Mathematics

1 answer:

katen-ka-za [31]3 years ago

4 0

Answer:

f(9) = 8

Step-by-step explanation:

Step 1: Define

f(x) = x - 1

f(9) is x = 9

Step 2: Substitute and Evaluate

f(9) = 9 - 1

f(9) = 8

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If Karri takes a 7 question true false test and guess on every question, what is the

dusya [7]

Answer:

The probability that she gets all 7 questions correct is 0.0078.

Step-by-step explanation:

We are given that Karri takes a 7 question true-false test and guess on every question.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,........$

where, n = number of samples (trials) taken = 7 question

r = number of success = all 7 questions correct

p = probability of success which in our question is probability that

question is correct, i.e. p = 50%

Let X = Number of question that are correct

So, X ~ Binom(n = 7, p = 0.50)

Now, the probability that she gets all 7 questions correct is given by = P(X = 7)

P(X = 7) = $\binom{7}{7} \times 0.50^{7} \times (1-0.50)^{7-7}$

= $1 \times 0.50^{7} \times 0.50^{0}$

= 0.0078

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3 years ago

Find sin q if q is an angle in standard position and the point with coordinates (4, 3) lies on the terminal side of the angle.

jolli1 [7]

Letâ€™s say we have a starting point (0,0), the point (4,3) are distance apart at 90 degrees, hence the hypotenuse to those two distance will be 5. Therefore sin q = 4/5.

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3 years ago

Cameron went on a diet for 2 months (8 weeks). He drank 80 fluid ounces of water per day during the first 3 weeks of his diet an

GarryVolchara [31]

The answer is 1,936 Hope this helped

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