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svetoff [14.1K]
4 years ago
6

An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection of

9 of them. If a student has figured out how to do 13 of the problems, what is the probability the he or she will answer correctly
all 9 questions? =.0147
atleast 8 questions ?
Mathematics
1 answer:
Anna [14]4 years ago
7 0

Answer:

The probability the he or she will answer correctly is 1.5%

Step-by-step explanation:

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Solve for x on [0, 2pi]
cluponka [151]

The required solution to the trigonometry equation is x = π/4 + π n.

The equation of trigonometry functions is given in the question as

secx - cscx = 0

We have to determine the solution to the given equation

As per the question, we have

⇒ secx - cscx = 0

⇒ 1/cosx - 1/sinx = 0

⇒ (-cosx + sinx)/cosxsinx = 0

Using property : f(x)/g(x) = 0 ⇒ f(x) = 0

⇒ -cosx + sinx = 0

Divided by cosx into the equation,

⇒ -1 + tanx = 0

⇒ tanx  = 1

The general solution for tan tanx  = 1 is

⇒ x = π/4 + π n

Learn more about Trigonometric functions here:

brainly.com/question/6904750

#SPJ1

8 0
1 year ago
Please help me with my work THANK YOU A LOT
inessss [21]

Answer:

A.)

Step-by-step explanation:

The answer that you had chosen is correct, because the number line is stating that you are subtracting 5 from 0, giving you -5. Then it is saying that you are subtracting 2 from that, giving you -7.

B.) is wrong, because they are adding the answer of the correct equation with another number, which would equal -12.

C.) is incorrect, because when you are adding a positive with a negative, you are actually subtracting, not adding. When you are doing this, always keep the sign for the answer (negative or positive) with whatever the larger addend is. So in this letter's situation, the equation would look like this: -5 + 2 = -3.

D.) is incorrect because once again, they are taking the original correct answer and subtracting it from another number, which would be -12.

I hope this helps.

5 0
3 years ago
The first term of an arithmetic sequence is five the 11th term is 125 what is the common difference of the arithmetic sequence?
GaryK [48]

Answer:

<h2><u><em>12</em></u></h2>

Step-by-step explanation:

y = 5

y + 10x = 125

5 + 10x= 125

10x = 120

x = 12

4 0
3 years ago
Use the exponential regression equation that best fits the data (10,4). (12,20), (13,35), and (16,300) to estimate y when x = 15
Aleonysh [2.5K]

Answer:

tbh idc

Step-by-step explanation:

5 0
3 years ago
What is x if 3x + 4 = 19?
Ymorist [56]
If you subtract 4 from both sides your left with 15, then divide by 3 to find x. your left with x=5
8 0
3 years ago
Read 2 more answers
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