Algebra 2 - Grade 11 Can anyone please help me with these Algebra 2 Math questions?

Soon as possible !!!

Find p(–4) if p(x) = 3x^3 – 2x^2 + 6x – 4

If r(x) = x^3 – 2x + 1, find r(2a^3).

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

To decrease an amount by 16% what single multiplier would you use

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle. what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle. what is the measure of angle a? enter your answer in the box. m∠a= 3.)quadrilateral abcd is inscribed in this circle. what is the measure of angle b? enter your answer in the box. m∠b= °4.)quadrilateral abcd is inscribed in this circle. what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle. what is the measure of angle c? enter your answer in the box.°