Find the equation of the axis of symmetry of the following parabola algebraically.
y=-x^2-2x-2

The perimeter of a rhombus with a side of 6 is 24

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.