Question

A1 =-88 S11=22a11-? d-?

Answer 1

$s = \frac{a1 + a11}{2} \times n = \frac{ - 88 + a11}{2} \times 11 \\ 22 = \frac{ - 88 \times a11}{2} \times 11 \\ 2 = \frac{ - 88 + a11}{2} \\ 4 = - 88 + a11 \\ a11 = 92 \\ \\ a11 = a1 + d(11 - 1) \\ 92 = - 88 + 10d \\ d = \frac{92 + 88}{10} = 18$

Answer 2

It seems like you've provided some mathematical expressions with variables and placeholders. However, the expressions are not clear, as you've used "?" for some of the variables. If you can provide more information or clarify what you're trying to calculate, I'd be happy to help.

For instance, if you could provide the values of the variables represented by "?", I could assist in solving the equations or expressions.