Sandi has 3/5 of an hour to wrap presents. if it takes her 1/10 of an hour to wrap each present, how many can she wrap in the time she has left?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

I'm confused on this could anyone me and show me what i need to do to solve it.

The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?