1. anonymous
2. anonymous

i understand the equation http://www.regentsprep.org/regents/math/geometry/gp15/Circle12.gif where do the numbers go??

3. mathmate

hint: Read through the following link and you'd be a pro on this topic. http://www.regentsprep.org/regents/math/geometry/gp15/circleangles.htm Note: concentrate on theorem 5.

4. anonymous

LOL i was just on this

5. anonymous

but thanks i will contact you if i need more support

6. anonymous

@mathmath333 so far my equation is M=<ACE=1/2(158-64) WHAT IS THE 30??

7. mathmate

30 is the result of calculating $$\Large \frac{1}{2}(80-20)$$.

8. anonymous

ohhhhh ok so mine = 47

9. anonymous

@mathmate

10. mathmate

1/2(158-64) =47 is alright. But that's not the final answer. I think you need to solve for x, even though you did not post the question. To do that, equate that angle 9x-5 to 47 and solve for x.

11. anonymous

so 47=9x+5

12. anonymous

@mathmate

13. anonymous

so 4.66

14. mathmate

I think I read 9x-5. Perhaps I need glasses!

15. anonymous

5.77

16. anonymous

@mathmate

17. mathmate

You're very close, probably just a rounding problem. To round a decimal number, to 2 places of decimal, you would round up if the third digit after the decimal is greater than or equal to 5, or truncate if the third decimal is 4 or less.

18. anonymous

so it is 6