10s4-6s-3?
10s to the power of 4 minus 6s minus 3

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective