2 WHAT'S MORE
Activity 2:
Arithmetic Problems Solve the following problems involving arithmetic sequence

1. Find c so that the numbers 6c + 3, 10c -- 3 and 11c... form an arithmetic sequence.

2. If 5 arithmetic means are to be inserted between -10 and 8, find the 3rd arithmetic mean to be inserted.

3. What is the sum of all 3-digit number which is divisible by 7?

4. Which term in the arithinetic sequence 11, 4,-3... is -129?

5. In an arithmetic sequence, if a8 = 51 and a13= 91, find al, d and a25.

6. (Character Building)A fund drive was organized by section 10- Descartes to help the victims of Taal Volcano Eruption. To raise fund, each student contributed for the capital for online selling. On the first week they made P500 profit, on the second week, they got P800, third week 1100 and same pattern on the succeeding weeks.

a. How much profit will they gain on 12th week?

b. What is the total profit they made after 12 weeks?

c. Is their profit enough to buy for the things they want to donate to the victims if it is amounting to P60,000?

d. If you were one of the students of 10-Descartes , will you join the​