1.9r+0.1r=0.6 what s the value of r

∠1 and ∠2 are complementary. ∠1=x°∠2=(3x+30)° select from the drop down menu to correctly answer the question. what is the value of x? . a.15 b.25 c.30 d.40 e.55

52 cm radius = diameter = area = circumference = circumfer

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.