Guys please help me(assignment)​

Write a story that matches with the expression 42x-5 pls hurry

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible