algebra
posted by lost .
Will someone please look over these? I am so lost on these.
1. find the domain of p(x)=xsquared+10 I said {xx is a real number
2. find the intercepts of 3x+2y=6 I got (0,3) and (2,0)
4.find the equation of (6,6)and (6,6) got y=x
7. slope and yintercept of x+2y=4 got slope of 1 and (0,2) and (4,0)
9. are the lines 4x+6=y and 2y=8x5 parallel? got yes
10. slope of (13,16) (18,17) got 1/5
12. find the equation of m=8,(6,7) got y=8x41
13. equation of (7,9);x+5y=3  got y=1/5x+52/5
15. is 6x5y=9 and 6y5x=7 perpendicular? I put no
17. slope and yintercept of 5x=9y+36 got 5/9 for slope and (0,4)
21. slop and yintercept of 7/6x5/3 I got slope of 7/6 and (0,5/3)
If I missed any of these, will you please explain them to me? I need to understand these and am having a real hard time.

most are correct, you seem to be making small careless errors.
#7 slope = 1/2
#12, the given point does not satisfy your equation.
start with
let the equation be y = 8x + b
sub in (6,7)
7 = 8(6) + b
55 = b
so y = 8x + 55
#13 correct if the new line is supposed to be parallel to the given line, it did not say so.
#21 seems to be a typo
did you mean y = 7/6x5/3 ?
If so, then correct