Practice Test 2

In the diagram, parallel lines $$AB$$ and $$CD$$ are cut by transversal $$EF$$. The interior angle on the same side of the transversal measures $$(4x + 15)°$$ on line $$AB$$ and $$(6x - 25)°$$ on line $$CD$$. What is the value of $$x$$?

A school nurse wants to estimate the average amount of sleep students get per night. She randomly surveys 20 students four different times, getting these average results: 7.2 hours, 6.8 hours, 7.5 hours, and 6.9 hours. A teacher suggests the nurse should survey 100 students just once instead. Which approach is better for making inferences?