Can someone please help me with this !!! it’s geometry

The measurement of one angle of a right triangle is 34°. what is the measurement of the third angle?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882