N; n+1; n+2 - 3 consecutive numbers
n(n + 1) = (n + 2)² - 19 |use a(b + c) = ab + ac and (a + b)² = a² + 2ab + b²
n² + n = n² + 4n + 4 - 19 |subtract n² from both sides
n = 4n - 15 |subtract 4n from both sides
-3n = -15 |divide both sides by (-3)
n = 5
n + 1 = 5 + 1 = 6
n + 2 = 5 + 2 = 7
Answer: 5; 6; 7.
I suppose it would be 7x + 4y
Well, there is 10 marbles in total and there is 2 black marbles. So, you get 2/10 but you need to simplify it and then you get 1/5.
0.45*0.2= 0.09
so probability that there will be oil after the test= 0.09 %
Answer:
i believe its 1/6
Step-by-step explanation:
