Sid went scuba diving. He rose 15 feet from his original position. He then descended, going down in 3 increments of 7 feet each. His final position was 10 feet below sea level. Find Sid’s original position.

16

Step-by-step explanation:

I started at zero, added 15, we get 15, I then subtracted 21, since 3 times 7 is 21. I get -6. If instead made my base number 6, and then did all this, I would get zero. I would then add 10 to the base number of six, making my base number 16. Doing this process all over again, you indeed find it to be 10. 16 + 15 = 31. 31- 21 = 10.

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

answer: 94

step-by-step explanation: 79+91+92+94+94 = 450 divided by 5 (since there are 5 number that are being added) = 90