Answer: x=\pi n,\:x=\frac{\pi }{4}+\pi n
Step-by-step explanation:
Answer:
You can make 9 three Digit numbers
Step-by-step explanation:
The 9 three digit numbers are:
257
275
752
725
527
572
This can also be easily found out by multiplying the number of digits to the number of digits needed for the number, in this case, there are 3 digits, and the number must have 3 digits in them (without them repeating).
3 digits x 3 needed for the numbers = 9 three digit numbers
Represent these consecutive numbers (assuming that they are all integers):
x
x+1
x+2
x+3
x+4
x+5
and so on
x+8
x+9 is the tenth number. x+9 = 10, so x = 9.
Think of it this way: there are 10 consecutive numbers, and the last one is 10.
Working backwards, we get the sequence 10, 9, ... 3, 2, 1.
The sum of such an arith sequence is equal to the count of the numbers times the average of the first and last terms:
sum here = 10(1+10)/2 = 5(11) = 55 (answer)
Answer: I think it's B but i might be wrong
The butterfly method. Multiply then divide
