Question

i ned help wist tish qusitons please

Answer 1

u could use a arithmetic solution calculator. i think it would help. :)
https://www.omnicalculator.com/math/arithmetic-sequence five 1/2 star review

Answer 2

yes but i'd prefer an explanation, i don't quite understand the explanations given from the calculator.

Answer 3

okay srry luv i googled it and even tried to ask brainly but i couldnt find an answer that would answer ur question

Answer 4

arithmetic sum = (n/2)(a1 + an)

where n is the number of terms
a1 is the first term
an is the last term

because you have k = 1 to k = 5, evaluate the term 2k - 11 at k = 1 and k = 5 to get your first and last terms. because there are five terms, n = 5. plug in to the sum formula and evluate.