Ineed to know all the angles that are congruent

What is the measure of angle x? answer

Which expression is equivalent to -12(3x-3/4)

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.