Kai calculates that he spends 15% of a school day in science class. if he spends 75 minutes in science class, how many minutes does kai spend in school

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?