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If two is five more than one half a number n What is n?
-6
Let N be the sum of one right angle and two acute angles?
OK, if you like. N it is.
What Two consecutive negative integers have a product of 440?
You can do this by trial-and-error.Or, call one integer "n", the next one "n+1", and solve the equation: n(n+1) = 440 Note: Whichever of these two methods you use, it will be clear that this problem has no integer solution.
What are two consecutive integers have a product of 182?
One way to find out is write a formula. Let N and N+1 be the two integers, then N(N+1) = 182 N^2 + N - 182 = 0 This is a quadratic equation. If the factors are not obvious, (N -13)(N + 14) , then use the quadratic formula to find N. The factors tell you there are two possible solutions for N; 13 and -14. Now add 1 to these to get the two consecutive integers. 13 & 14 will work and -14 & -13 will work.
When do you use n - 1 or n - 2 to find the degrees of freedom and What type of question calls for one or the other?
If you have used the data to estimate one parameter then you would use n-1. If two parameters, then n-2.
