I'm giving 100 points. I need help with the first 4. this has to do with continuity, class is pre-calculus Determine whether f is continuous at c. Use algebraic substitution, graphing, and or tables to determine your answer. Show your work to justify your answer.
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The system of equations graphed below has how many solutions?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7