What is the length of ru ?

10 cm
8 cm
6 cm
5 cm

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

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.

What expression is equivalent to (84+16)