Sold 45 of his dvds and purchased 10 more. if smith has 15 dvds now, how many dvds did he have to begin with?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?