Determine the direction this parabola opens:
y=x^2+2x+8

down or up

Which of the following is true for the relation f(x)=2x^2+1

Mr. zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years

In the diagram below de and ed are tangent to 0 which expression gives the measure of def