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Please help this is due tomorrow morning !!

Simply 8x squared + 5(7x squared- x) - 2x =

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?