The sum of 1st 7 terms of an ap is 140 the next 7terms of same ap is 385 find ap​

step-by-step explanation:

d would equal 12

1.) 21

2.) 0.453

3.) 1.5

4.) 48

5.) $ 22

step-by-step explanation:

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !