Which are the solutions of x2 = –13x – 4? 0, 13 0, –13

Parks is wearing several rubber bracelets one third of the bracelets are tie-dye 1/6 are blue and 1/3 of the remainder are camouflage if parks wears 2 camouflage bracelets how many bracelets does he have on

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota