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Earn +20 ptsQ: What is the answer for 5 n - 2?
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A example of a variable in math?
5n (also known as 5xn)=10, which means n=2. n is the variable. 5-n=2 which means n=3 5/n (I'm trying to say 5 over n, also known as 5 divided by n)=20, which means n=0.25. 5+n=7 n=2.
What is the answer for n plus 2 equals 5?
n + 2 = 5, solve for n.n = 5 - 2n = 3
What is the largest number of diagonals that can be drawn inside a polygon with n sides?
Formula: number of diagonals = 1/2 * n(n-3) where n is the number of sides or vertices Example: to get the number of diagonals in a pentagon pentagon has 5 sides or vertices; thus, n = 5 no. of diagonals: = 1/2 * n(n-3) = 1/2 * 5(5-3) = 1/2 * 5(2) = 1/2 * 10 = 10/2 = 5
When 5 is added to 2 times a number the result is 45 Find the number?
Let number be N, then 2 x N + 5 = 45 2 x N = 45 - 5 = 40 N = 20
What is the sum of the multiples of 2 from 2 to 10 . everyone knows the simple answer but What is the formula to calculate this?
The sequence of numbers is 2n where n goes from 1 to 5 Now sum (over n=1 to 5) of 2n = 2*sum (over n=1 to 5) of n = 2 * [5*(5+1)]/2 = 5*6 = 30
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