ross has a mean mark of 50% for her three math tests and then she earns a mark of 70% on her fourth test. ross states that since the average of 50 and 70 is 60, her new mean math is 60%. do you think ross is correct?

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

How do you use the elimination method for this question? explain, because i really want to understand!