Question

please help, the picture will be below.

Answer 1

plug in each number until the outcome is 1

Answer 2

so it would be A. 5?

Answer 3

correct another way you could do it is by a method i created, cross equality :)

Answer 4

9/5 * 5/9 = 1

Answer 5

thank you :)

Answer 6

No prob

Answer 7

Select the most reasonable estimated answer.



719.4 – 211.9









A.
5100







B.
5







C.
51







D.
510

Answer 8

I used a calculator and I got 507.5. but that's not a answer choice