Lupe and her friends spent $20 on snack mix and water. They bought x bags of snack mix and y bottles of water. They bought A total of 11 items. The system of equations can be used to determine how many of each item they bought. 20.00=2.50x+1.00y
11=x+y
how many bags of snack mix did they buy?

Which of the following of the following sets of side lengths could not form a triangle?

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

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”?