Don’t answer just for points please~ I need help and I’m struggling lol

Find the x-intercept and y-intercept of the line. 3x + 5y = −15

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?