Answer:
John answered 50 questions.
Step-by-step explanation:
Although five of John's answers were incorrect, 90% of his answers were correct.
This means that 5 is 100 - 90% = 10% of the total number of questions, n. So



John answered 50 questions.
Answer:
D) 1.9 meters
Step-by-step explanation:
a= -1.6, b=3.3, c=0.2
vertex is (1, 1.9)