Write an expression to describe the sequence below. use n to represent the position of a term in the sequence, where n = 1 for the first term.
-95, -190, -285, -380,
show how you got the answer, i want to use it for further examples to solve problems like this myself. you.

= - 95n

Step-by-step explanation:

Note the difference between consecutive terms in the sequence is constant

- 190 - (- 95) = - 190 + 95 = - 95

- 285 - (- 190) = - 285 + 190 = - 95

- 380 - (- 285) = - 380 + 285 = - 95

This indicates that the terms are an arithmetic sequence with n th term

= a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 95 and d = - 95, thus

= - 95 - 95(n - 1) = - 95 - 95n + 95 = - 95n

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation: