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iris [78.8K]
3 years ago
14

I need help ASAP .......

Mathematics
1 answer:
pickupchik [31]3 years ago
4 0

Answer:

0

Step-by-step explanation:

its 0 because if you add 29 and 31 and 10 youll need to simplify and it wont be very exact so you would have to fracertize and it would equle 0

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There are 5 questions on a multiple choice exam, each with five possible answers. If a student guesses on all five questions, wh
Mrac [35]

Answer:

20.5\%

Step-by-step explanation:

Let's write out a case for two specific questions being correct and the rest being incorrect:

\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5},

The \frac{1}{5} represents the chances of getting the question correct, as there are 5 answers and 1 correct answer choice.

The \frac{4}{5} represents the chances of getting the question incorrect, as there are 5 answers and 4 incorrect answer choices.

The equation above does show the student getting two answers correct and three answers incorrect, but it only shows one possible case of doing so.

We can choose any two of the five questions to be the ones the student gets correct. Therefore, we need to multiply this equation by the number ways we can choose 2 from 5 (order doesn't matter): \binom{5}{2}=10.

Therefore, the probability the student gets two questions correct is:

\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \binom{5}{2}=\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot 10=0.2048\approx \boxed{20.5\%}

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3 years ago
The triangles to the right are congruent. Which of the following statements must be true
tiny-mole [99]

Answer:

It is the last one, bc=df

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3 years ago
What is the property of the equation?
gogolik [260]

It is the associative property :)
7 0
3 years ago
Two less than five times a number, x, is forty-eight.
erma4kov [3.2K]

analyze the problem

i think you want me to solve for x

so, 5x-2=48

move two to other side an then add

5x=50

divide

x=10

4 0
2 years ago
Read 2 more answers
Solve.
german

Answer:

(3,2)

Step-by-step explanation:


3 0
3 years ago
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