What are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15?

Question

15,30,45,60
15,16.5,18,19.5
15,22.5,33.75,50.625
none of the above

What are the first four terms of a geometric sequence if the common ratio is 10 and the first term is 4.5?
4.5,.45,.045,.0045
4.5,9.0,13.5,18.0
4.5,14.5,24.5,34.5
none of the above

Thabnks for the help :)

Answer 1

For your first question the answer is...
15,16.5,18,19.5
because the first number is 15 and you can add 1.5 to each of the values to get the next value.

For your second question the answer is either the top or the bottom depending on how you are using the ratio.

Answer 2

Unit 5 lesson 1
1. C
2. B
3. C
4. B
5. D

Answer 3

Hal is 100% right :)

Answer 4

Unit 5 lesson 1
1. C
2. B
3. C
4. B
5. D

still right for 2021

Answer 5

Jonas is correct for 2021 connexus

Answer 6

still correct ^^^^