If a quadratic function is concave down, which of the following is true? a is positive
a is negative
a is zero

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.