2n + 3 = 5

N/2 + 1 = 9

Hope This Helps

Step-by-step explanation:

The common difference (d) = 2

The first element (a) = 3.

So, the n-th term is

I = a + (n-1).d

= 3 + (n-1)×2

= 1 + 2n.

So the required sum is

= (n/2)(a + I)

= (n/2)( 3 + 1 + 2n)

= (n/2)(4 + 2n)

= n (n+2)

Visit Me @ farmerstelephone3.wixsite.com/pin-non

20

step-by-step explanation:

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3