Answer:
-675
Step-by-step explanation:
The sum can be broken into parts that you know. Here, one of those parts is the sum of numbers 1 to n. That sum is given by n(n+1)/2.
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Another way to do this is to realize the sequence of numbers is an arithmetic sequence with a first term of 65 and a last term of 67-2·75 = -83.
The sum of an arithmetic sequence is found by multiplying the number of terms by their average value. Their average value is the average of the first and last terms.
The average value of those 75 terms is (65 +(-83))/2 = -9, so their sum is ...
75(-9) = -675
Answer:
-25/42
Step-by-step explanation:
Answer:
the y -intercpt is the 3
the slope is -3/4
Step-by-step explanation:
this is because the 3 is the starting point on the y-axis and the slope is -3/4 because you are going down 3 to the right 4 ---hope this helps
1. First do 18,000 times .20 to get 3,600. Next minus 18,000 by 3,600 and you get $14,400 which is the answer.
2. First do 125 times .15 to get 18.75. Next minus 125 minus 18.75 to get 106.25. Then you do 106.25 times .05 to get 5.31. Finally, add 5.31 to to 106.25 and you get $111.56.
3. 17/39 as a decimal is .4358
4. First you do 45 times .06 to get 2.7. Finally you add 2.7 back onto 45 to get $47.7
5. true (i’m 99% sure on this question)
hope dis helped
