In ΔCDE, \text{m}\angle C = (5x+18)^{\circ}m∠C=(5x+18) ∘
, \text{m}\angle D = (3x+2)^{\circ}m∠D=(3x+2)
∘
, and \text{m}\angle E = (x+16)^{\circ}m∠E=(x+16)
∘
. Find \text{m}\angle D. m∠D.

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

At which value in the domain does f(x) =0?