0
(1/2s)+(1/5x)+7
5s+2x+7
5s=2x+7
s=2/5x+7/5
(1/2(2/5x+7/5))+(1/5x)+7
1/5x+3.5/5+1/5x+7
2/5x+7 7/10
2/5x=-7 7/10
x=-19.25
(1/2s)+(1/5x)+7
1/2s-3.85+7
1/2s+3.15
1/2s=-3.15
s=-6.3
(1/2s)+(1/5x)+7
1/2(-6.3)+1/5(-19.25)+7
-3.15-3.85+7
0
In the end, it equals 0 because there were no values for x and s and since I started with just an equation with nothing on the other side, I used (by default) 0 on the other side.
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7 times the sum of x and s?
=7(x+s)
What is the sum of all integers not greater than 10000 that are not divisible by 7?
This is easiest to answer by summing all the numbers 1-10000 and subtracting the sum of the multiples of 7 (7, 14, 21, ..., 9996). The sum of a series is: S = (first + last) x number_of_terms / 2 For for 1-10000, the sum is: S1 = (1 + 10000) x 10000 / 2 = 10001 x 5000 = 50005000 For the multiples of 7 the sum is: S2 = (7 + 9996) x 1428 / 2 = 10003 x 714 = 7142142 So the sum of all integers not greater than 10000 that are not divisible by 7 is: S = S1 - S2 = 50005000 - 7142142 = 42,862,858
Why are the sum of the opposite face of die is 7?
Because the put the opposite #'s on the opposite side
The number is between 0 and 150. If you start with 7 and keep counting by 7's the number will be on your list. The sum of digits in the number is 12. The number can be divided evenly by four?
The answer is 84.
What is the sum of five and twice a number?
Let 'n' represent any number, and 'S' represent sum. S = 5 + 2n
