The answer is 3n+1
What i did was add the like terms.
-7n+10n= 3n
-7 + 8=1 (the 7 is negative because it's being subtracted)
if you put it together you get 3n+1
hope this helps
Answer:
2.8 liters
Step-by-step explanation:
So there are various ways to do this problem, this is just MY preferred way.
Since we are given 1/4th of a total value with 14 liters, we can actually make this 4/4 by multiplying our given value by 4. In this case, 14 liters for 25% becomes 56 liters for 100% antifreeze.
Since we know have a percent of 100%, we can proceed to take 10% increments, all the way up to 30%
10% is 5.6, multiplied by 3 is 16.8
While you might want to put 16.8 instantly, don't forget we are looking for how much is ADDED from 25%, not just how much there is.
In this case, subtract 14 from 16.8 to come out with a grand total of 2.8 liters added.
A ratio has to be equal to what is given, in this case, 5/45. 5 divided by 5 is 1 and 45 divided by 5 is 9. So one answer is 1/9.
Answer:
B
Step-by-step explanation:
Initial mean = 156, Changed mean = 163.92
So, mean increases. Only condition that satisfies this is B.
