Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -5x2 + 7x + 6.
answers are:
-5/7
6
7/10
-7/5
need answer
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Me asap! what is the slope of this line? enter your answer in the box.

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?