Answer:
65
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Let A = he known the answer then A' = he guess the answer.
B = he answered it correctly
As per given , we have



By Bayes theorem , we have

The probability that the student knows the answer given that he answered it correctly is
.
Answer:
45
Step-by-step explanation:
6a 6b
2 : 3
30 : x
<u>30</u><u>×</u><u>3</u>
2
=45
Answer:
C. 9
Step-by-step explanation:
y = -4x^2 + 2kx
subtitute 3:
y = -4(9)^2 + 2k(9)
y = -4(81) + 18k
let y = 0
=> 0 = -324 + 18k
=> k = 324/18 = 9
this is my calculations hope it helps
A graph that has no breaks in it is called a continuous data