The sum of the k for k=1 to k="n"=(n*(n+1))/2 , where "n" is the total integer.
In this problem n = 200
Sum = (200*201)/2 = 20,100
The answer is obtuse triangle
(Kevin) y= k-6 - k minus six
(Melanie) y= 2(k-6) - two times k minus six
K, only got that far... sorry
Here's an example.
Sally was buying two mangos at the grocery store. She brought a coupon that day and god 10 dollars off the mangos, <em>k,</em> price. The cashier told her to pay $6. How much did each mango cost?
