Victor borrowed $21.50 from his mother to go to the theater. a week later he paid her $21.50 back. how do he still owe her?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.