Find the sum of first 34 terms of an ap whose second and third terms are 14 and 18

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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”?

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8