÷
The first thing you must do it to solve the fractions inside the parentheses first
which is
because you must get a common denominator in order to solve. The common denominator is 6. So you must multiply in order to get 6.
Then you do the other fraction:
which is
because 15 is the common denominator and you must multiply the denominator to get 15, thus, you must multiply by the same amount for the numerator. So now it is
÷
but when dividing, you just need to flip-flop the second fraction and then multiply across. Now it is
But to simplify, you find a common factor which is 3.
45÷3=15 and 6÷3=2 which is now
You answer is C)
1. solution: (x,y)=(1,12)
x + 11 = 12x
x = 1
x = 12 x 1
y = 12
(x,y) = (1,12)
if you need the rest, let me know.
Since 1 is positive, then D would be your answer.
25% decrease because if you multiply 20x.25 you get 5 and you minus the 5 from 20 books and you get 15 books
Answer:
1/6
Step-by-step explanation:
I think this is tricky.
when you randomly choose the 1st two times, it doesn't matter as long as Na was not chosen, otherwise the probability would become ZERO for the 3rd one be Na.
So, after 1st two is removed, there are only 4 left in the pool, so picking Na at the 3rd draw is 1/4 probability.
But, come to think of it, when 1st draw, you have to draw the other 5 out of 6, 2nd draw the 4 out of 5, then 3rd is 1 Na out of the 4.
So, 5/6 x 4/5 x 1/4 = 1/6
