-1+- 4x = 11
How does it = this I need help pls

Math each whole number with a rational,exponential expression

In the geometric progression –3, 12, −48… what term is 3,072?

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.