Answer:
2/5 m - 1/5
Step-by-step explanation:
2 ( 1/5 m - 2/5) + 3/5
Distribute
2/5 m - 4/5 + 3/5
Combine like terms
2/5 m - 1/5
X= 4.5
18x - 9 = 72 are the equations
Answer:
So the idea is that we want to find the total number of ways that we can pick 7 diamonds (real or fake) from the 12 diamonds.
So as you said, 12 choose 7 = 792
Now we need the total number of ways that we can satisfy that of the 7 we picked, exactly three are real, but this also means that four are fake.
So to choose 3 real from 5 is 5 choose 3 = 10
And to choose 4 fake from 7 is 7 choose 4 = 35
3x10/792= 350/792= 175/396
Answer:
$18,000
Step-by-step explanation:
9% of 10,000 is 900.
900 (annual interest) x 20 (years)= 18,000