Since there is a common difference of one, this is an arithmetic sequence of the form a(n)=a+d(n-1) which in this case is:
a(n)=15+1(n-1)
All arithmetic sequences have a sum which is equal to the average of the first and last terms time the number of terms, mathematically:
s(n)=(2an+dn^2-dn)/2 (that is just the result of ((a+a+d(n-1))(n/2)) )
Since a=15 and d=1 this becomes:
s(n)=(30n+n^2-n)/2
s(n)=(n^2+29n)/2 so
s(10)=(100+290)/2
s(10)=195 logs
Answer:
q xd
Step-by-step explanation:
xd?
Answer:
Step-by-step explanation:
12
rs st tw rt rw sw
13
sr sw tr st tw
14
tr and tw
sr and st
I'll depend on you to add the proper markings on the answer.
Answer:
good morning :)
the answer is 15
Step-by-step explanation:
because jayda found 5 and ruby found twice as her which means he found 10 and all they are asking you to do is add jayda's and ruby's sheashells togather
hope this helps <333
brainliest plz? :)
Answer:
Area equals to 3/16
Step-by-step explanation:
You can compute this with the easiest way,that is with formula
Area=LENGTH×WIDTH
So,1/2 × 3/8=3/16
