Describe the error in solving for one of the variables in the linear system 42 + 3y = 8 and 2 – 2y = –13

The circumference of a circle is 5 pi cm. what is the area of the circle?

2/3(-6y+9x) expand each expression using the distributive property

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”?