What is every fraction with a whole number denominator less than 50 that is equivalent to 10/15

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.