math for grade 10

3. RECALL: FORMULA 1
𝑛 𝑡ℎ
TERM OF AN ARITHMETIC SEQUENCE
𝑎 𝑛 = 𝑎1 + 𝑛 − 1 𝑑

4. EXERCISE 1
IN THE ARITHMETIC SEQUENCE
9, 11, 13, 15, 17, . . . ,
A. WRITE A FORMULA FOR THE 𝒏 𝒕𝒉TERM,
B. FIND ITS 𝟏𝟐 𝒕𝒉 TERM, AND
C. WHICH TERM IS 47?

5. EXERCISE 1
IN THE ARITHMETIC SEQUENCE
9, 11, 13, 15, 17, . . . ,
a.WRITE A FORMULA FOR THE 𝒏 𝒕𝒉TERM
𝒂 𝒏 = 𝟐𝒏 + 𝟕

6. EXERCISE 1
IN THE ARITHMETIC SEQUENCE
9, 11, 13, 15, 17, . . . ,
B. FIND ITS 𝟏𝟐 𝒕𝒉 TERM
𝒂 𝟏𝟐= 𝟑𝟏

7. EXERCISE 1
IN THE ARITHMETIC SEQUENCE
9, 11, 13, 15, 17, . . . ,
C. WHICH TERM IS 47?
𝟐𝟎 𝒕𝒉
TERM

9. EXERCISE 2
FIND THE 𝟏𝟖 𝒕𝒉
TERM OF THE
ARITHMETIC SEQUENCE
WHOSE FIRST TERM IS 11 AND
WHOSE SEVENTH TERM IS 59.
The 𝟏𝟖 𝒕𝒉 term
is 147.

10. EXERCISE 3 – WORD PROBLEM
Aldub gets better and better at a
video game everytime he plays. He
scores 20 points in the first game,
25 in the second, 30 in the third
and so on. How many points will
he score in his 15th game?