Looks like you just evaluated the summand for the given value of

, whereas the question is asking you to find the value of the sum for the first

terms.
Let

. Then

is the

th partial sum.

happens to be the first term in the series, which is why that box is marked correct:

But the next partial sum is not correct:

and this is not the same notion as the second term (which indeed is 0.75) in the series.
Answer:
Step-by-step explanation:
It's never negative.
Answer:
The time you have before finance charges are assessed is called the Grace period
option-D
Step-by-step explanation:
we know that
Grace period is the extra time given to customer to pay amount before finance charges
But once grace period passes , customer will have to pay extra fee or penalty with interest with passing days
So,
The time you have before finance charges are assessed is called the Grace period
So,
option-D
If you multiply the top equation by -2 you get:
-4x -14y = 14 => -4x = 14+14y
now you can plug in the -4x into the second equation:
14+14y - 3y = -19 => 11y = -33 => y=-3
Fill in y=-3 in either equation to find x:
2x - 21 = -7 => 2x = 14 => x=7
So your ordered pair is (7,-3)