Posted by **Soly** on Sunday, September 16, 2007 at 5:06pm.

Could you please help me and check my answers?

Find the domain of the function.

f(x)=-8x-2

-I got the domain being (negative infinity, postive infinity).

g(x)= 3x/(x^2 -49) (I got (-inifinity,-7)U (-7,7) U (7, +ininfinity) The U is the union symbol.

Find the domain of the composite function f * g.

12. f(x)=x+3, g(x)=1/(x+7) I got (-inifinity, + inifinity) but would it be ((-inifinity,-7) or (-7,+inifinity)

15. f(x)=7x+70, g(x)=x+2 I got for this one ((-infinity,-12) or (-12,+inifinity))

## Answer this Question

## Related Questions

- Functions - Could you please help me and check my answers? Find the domain of ...
- Algebra - Could you please check my answers and help me with one? Find the ...
- Math Please Check - Please tell me if this are right. Thank you! Find the exact ...
- Check my precalc - 1. find without a calc log base 5 of cubed root of 25. I got ...
- Quadractic Functions - Please check my answers. Find the x-intercepts (if any) ...
- Please check my Caclulus - 1. Find all intervals on which the graph of y=(x^2+1...
- Algebra - I know what the answer is just not how to exopress it. Can someone ...
- Algebra - I know what the answer is just not how to exopress it. Can someone ...
- check my precalc - #1. solve x^2-1<0 I got (-1,1) #2 x(x+1) >20 I got (-...
- algebra 2 - what is the domain in interval notation when the restrictions are x ...

More Related Questions