I'm pretty sure this is the answer but it's been a while since I've done system of inequalities. Essentially the value and number of dimes is less than the value and number of quarters. And the value of both is less than or equal to 2 dollars
If this is algebra, then you will be using a parabola to solve this problem: t=-b/2a t=-8/2(-16) = 8/-32 = -1/4 t=-1/4=-0.25 h=-16(0.0625)+8(-0.25)+80 h=1-2+80 h=79 (-0.25,79) then plug this ordered pair above and draw a line directly down the middle of it to use as a "mirror" and plug 2 different numbers(preferably 0 and 1) into the variable t to find the other two points and then reflect the two points over the "mirror" to get the last two points to graph your paprabola