Answer choices are in the picture. PLEASE HELP

∠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

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5