exam Maths Puzzle Numerical Ability

Suppose that Math 103 scores are normally distributed and they have a mean of 80 and a standard deviation of 6.
A) Find the Math 103 Score two standard deviations above the mean.
B)What percent of all scores is greater than 92?

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exam Other Question

How would I solve this by substitution
6x-3y=6
y=2x+5
find the coordinates of the vertex for the parabola defind by the given quadratic function.

f(x) = 3-x^2+2x