1.6
The formula to sum a series of numbers is: sum = 1/2 x number_of_numbers x (first_number + last_number) So to sum the integers 5 to 500: From 5 to 500 there are 500 - 5 + 1 = 496 integers, so sum = 1/2 x 496 x (5 + 500) = 125240
3*(5+x) or 3(5+x)
12 x 5 = 60
(x+5)/3
1.6
0.8333
X+5
The formula to sum a series of numbers is: sum = 1/2 x number_of_numbers x (first_number + last_number) So to sum the integers 5 to 500: From 5 to 500 there are 500 - 5 + 1 = 496 integers, so sum = 1/2 x 496 x (5 + 500) = 125240
x+5=7 -5 -5 x=2
3*(5+x) or 3(5+x)
7+(x+5)
x=5/y=5
12 x 5 = 60
Sum(X) = 37 Sum(X2) = 289 Var(X) = Sum(X2) - sum(X)2/n = 289 - 37*37/5 = 15.20
3 x 5 x 5 x 5 x 7
(x+5)/3