It’s the first one.............
Answer:
Mean: 915.6
Mode: (there is none)
Median: $900
Step-by-step explanation:
A. 3+4-7
0
B. 50=-30=-40
50=/=-30=/=-20
No solution
C. 4+-100
-96
D. (-166)(1)
-166
I obviously cannot circle terms and sadly the attachments don’t work for me but each term like each section
Answer:
23 starfish, 7 octopi
Step-by-step explanation:
x=starfish
y=octopi
x+y=30
5x+8y=171
-5(x+y=30)
5x+8y=171
-5x-5y=-150
5x+8y=171
3y= 21
y=7
x+7=30
x=23
23 starfish, 7 octopi
a. Notice that
1/(1*2) = 1/2 = 1 - 1/2
1/(2*3) = 1/6 = 1/2 - 1/3
1/(3*4) = 1/12 = 1/3 - 1/4
and so on, which suggests the n-th term of the sum can be written as

Then the sum itself is telescoping:



b. The proof is trivial:

so the formula found in (a) is correct.