Answer:
0.173 probability that she gets exactly three questions correct.
Step-by-step explanation:
For each question, there are only two possible outcomes. Either she guesses the correct answer, or she does not. The probability of guessing the correct answer for a question is independent of other questions. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which 
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
Seven questions:
This means that 
Each question has four choices.
Abby guesses, which means that 
Find the probability to the nearest thousandth, that Abby gets exactly three questions correct.
This is P(X = 3).
21/36.
All you have to do is multiply numerators by numerators and denominators by denominators. Simplify if needed
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Answer:
f^-1(x) = x - 2
Step-by-step explanation:
To find the inverse of a function in terms of x and y, you would sway x and y in the function. We can rewrite f(x) = x + 2 as y = x + 2, since f(x) is basically y in a function. The inverse of y = x + 2 would be x = y + 2. Now, solve for y.
x = y + 2
-2 both sides.
x - 2 = y
y = x - 2
The inverse of y = x + 2 would be y = x - 2, so the inverse of f(x) = x + 2 would be f^-1(x) = x - 2 (f^-1(x) means the inverse of f(x)).
f^-1(x) = x - 2
I hope you find this helpful. :)
Answer:
-12x-28=4
-12x=32
x=-16/3
Step-by-step explanation:
The hour all animals get fed at the same time if Frankie starts at 6:00 Am is 6:00 pm
<h3>Common multiple</h3><h3 />
- Hamster 4oz of food = 6 hours
- Guinea pigs 12oz of food = 12 hours
- Land tortoise 24oz of food = 24 hours
Find the lowest common multiple
- 6 hours = 6, 12, 18, 24
- 12 hours = 12, 34, 36
- 24 hours = 24, 48, 72
The lowest common multiple of 6, 12 and 24 is 12
if Frankie starts at 6:00 Am?
6:00 am + 12 hours
= 6:00 pm
Therefore, the hour all animals get fed at the same time if Frankie starts at 6:00 Am is 6:00 pm
Learn more about common multiple:
brainly.com/question/10749076
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