This sequence starts with an initial set; let’s call it s1. This set contains 20 cans, and every set following would have two less cans than the last set. So,
s1=20
s2=s1-2=18
s3=s2-2=16
•
•
•
s9=s8-2=4
How many cans in the display represents the value of each set added together, so we can denote this as
s1+s2+s3+...+s9
and replacing with values:
20+18+16+...+4 = 108
The number of cans in the display equals 108.
(The set notation seems weird, but by practicing this application now, the Calculus version will seem easier.)
Answer:
b
Step-by-step explanation:
There is 2 chances that both you and your friend can be picked.
Answer:
10.25 gallons
Step-by-step explanation:
432 miles / 6 gallons=72 miles to gallon
738 miles / 72 miles per gallon=10.25 gallons
