help me with this question please id like too know the stretch factor and y-intercept of this equation

Find the value of x for which the lines are parallel.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.