THE EXPLICIT FORMULA Use the following arithmetic sequence and the formula an= a1 + (n - 1)d to answer the questions below. 123, 116, 109, 102, 95, ...

Part I: Find the value of each of the following: 21 = 123 and d=-17

Part II: Find the explicit formula. Show your work.

Part III: Use the explicit formula you found in Part II to find the value of the 100th term in the sequence, a100. Show your work.

State whether each sequence is arithmetic or geometric, and then find the explicit and recursive formulas for each sequence. (10 points: 5 points each)

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

a

step-by-step explanation:

the answer is a

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )