Give me an answer and explanation to -30÷1.5

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?