What is the probability of pulling a card from a deck of 52 cards and getting a king and a queen?
2 answers:
You might be interested in
Answer:
Step-by-step explanation:
y=x^2-x+1
We want to solve for x.
I'm going to use completing the square.
Subtract 1 on both sides:
y-1=x^2-x
Add (-1/2)^2 on both sides:
y-1+(-1/2)^2=x^2-x+(-1/2)^2
This allows me to write the right hand side as a square.
y-1+1/4=(x-1/2)^2
y-3/4=(x-1/2)^2
Now remember we are solving for x so now we square root both sides:
The problem said the domain was 1/2 to infinity and the range was 3/4 to infinity.
This is only the right side of the parabola because of the domain restriction. We want x-1/2 to be positive.
That is we want:
Add 1/2 on both sides:
The last step is to switch x and y:
Answer:
31 oranges
Step-by-step explanation:
Let n be the number of oranges and m be the number of bags Mr. Teo has.
If he packs 5 oranges in each bag, then he packs 5m oranges in m bags and since he is short of 4 oranges,
If he packs 4 oranges in each bag, then he packs 4m oranges in m bags and since he has 3 oranges left,
Equate right sides of these two equations:
Hence,