Answer: D. About 0.09 milligrams
Step-by-step explanation:
I took the quiz and got it right!
Answer:
D) 5/12
Step-by-step explanation:
Suppose there are 30 girls at the school. Then the proportions tell you that 12 of them study music, and 5 of them study both music and dance.
Then 5 of the 12 girls who study music also study dance. That fraction is 5/12.
_____
We chose 30 because it is the least common multiple of the denominators of the fractions (2/5, 3/5, 1/6) in the problem statement.
Of course, you know that 2/5·30 = 12, and 1/6·30 = 5.
When factoring, you want to pull out the greatest common factor. Between 42 and 12 we have a common factor of 6. 2 would go into both too, but is not the greatest common factor. We do not have a common variable though.
=42x + 12y
=6(7x + 2y)
CHECK:
=6(7x + 2y)
=(6*7x) + (6*2y)
=42x + 12y
ANSWER: 6(7x + 2y)
Hope this helps! :)
This is a summation notation also called the sigma notation.
In this case it means starting with k=0 what's the sum of (1+k!) for all integer k until 4
So we just need to find the sum 1+0!+1+1!+1+2!+1+3!+1+4!=5+1+2+6+24=8+30=38
