Please help me with these equation?

Question

1. What is the next term of the sequence 21, 15, 9, 3, . . . ?

a. 1

b. 0

c. -3

d. -6

2. What is the next term of the sequence 9, 6, 4, 8/3, . . . ?

a. 2/3

b. 16/3

c. 8/9

d. 16/9

3. What are the next two terms of the sequence 32, -48, 72, -108, . . . ?

a. -162, 189

b. 162, -189

c. -162, 243

d. 162, -243

4. What are the next two terms of the sequence 55, 70, 85, 100, . . . ?

a. 115, 130

b. 130, 145

c. 120, 140

d. 125, 150

5. What is the twenty-fifth term of the arithmetic sequence with a1 = -1 and d = -10?

a. -240

b. -241

c. -250

d. -251

Answer 1

1.-3

2.16/9

3.162, -243

4.115, 130

5.-250

Answer 2

I won't do your homework but i will help you with your grammar: Equations*

Answer 3

I only know two answers.

1. d. -6

4. a. 115, 130

HIH! =)

And it's okay that you need help on your math, because I'm not very good at it either! I hate it with a passion!!! =(

Answer 4

1.c

(-1)*3=-3

2. d

xi, x(i+1) x(i+1)=xi/1.5

3.d

8*4,-8*6,8*9,-8*13.5,8*20.25,-8*30.75

8*xi, 8*x(i+1) x(i+1)=xi*1.5

4. a

xi, x(i+1) x(i+1)-xi=15

5. b

an = a1 + (n – 1)d

a25=-1 + 24*(-10) = -241

Answer 5

1) c.  - 3

2) d. 16 / 9

3) d. 162, - 243

4) a. 115, 130

5) b. - 241

Answer 6

that is sad that you need help on this.