Alyce has 60 marbles. of the marbles, 45 are red and the rest are black. what is the ratio of the number of black marbles to the number of red marbles

What is the slope of a line that is perpendicular to y = 3x + 1

Select true or false to tell whether the following conditional p q is true or false. use the truth table if needed. if a week has seven days, then a year has twenty months.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.