Assemble the proof

(isn’t timed, i still need help)

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Describe how making an ‘and’ compound sentence effects your solution set

Arectangular lawn is 14m long and 10m wide. a strip of uniform width is mowed around the outside of the lawn. how wide is the strip when the area of the unmowed portion of the lawn is 12m². (the answer is 4m, but i need to know how to solve it)