S10 = -150;
<span> the sum of next 10 terms = S20 - S10 => -550 = S20 + 150 => S20 = -700;
</span>S10 = -150 => 2a1 + 9r = -30;
S20 = -700 => 2a1 + 19r = -70;
Then 10r = -40 => r = -4 , and, 2a1 -36 = -30 => 2a1 = 6 => a1 = 3;
Answer:
$26.99
Step-by-step explanation:
i multiplied $89.99×.7 to get $62.993 and subtracted that from the regular amount.
hope this is right and helps :)
Answer:
8+2/2
= 5
-7+1 / 2
= -3
(5,-3) is the correct answer
Answer:
-1215
Step-by-step explanation:
you muiltpy by -3 every time
The answer is No. The mean of the sample and that of the population can not be equal. As the sample moves closer to the population, the mean of sample moves closer to the mean of the population