A local maximum of the function f(x) occurs for which x-value?
-4
-3
-2
-1

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

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

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle