Posted by **lost** on Thursday, September 17, 2009 at 7:29pm.

Will someone please look over these? I am so lost on these.

1. find the domain of p(x)=xsquared+10- I said {x|x 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 y-intercept of x+2y=4- got slope of 1 and (0,2) and (4,0)

9. are the lines 4x+6=y and 2y=8x-5 parallel? got yes

10. slope of (-13,-16) (-18,-17)- got 1/5

12. find the equation of m=-8,(6,7)- got y=-8x-41

13. equation of (7,9);x+5y=3 - got y=-1/5x+52/5

15. is 6x-5y=9 and 6y-5x=7 perpendicular? I put no

17. slope and y-intercept of 5x=9y+36- got 5/9 for slope and (0,-4)

21. slop and y-intercept of -7/6x-5/3- 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.

- algebra -
**Reiny**, Thursday, September 17, 2009 at 8:09pm
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 = -7/6x-5/3 ?

If so, then correct

## Answer this Question

## Related Questions

- algebra - Can someone check my answers please and if Im wrong please explain. 1...
- algebra - Can someone check my answers on exploring conic sections? 1. Graph x2...
- math - the function f is defined: f(x)= x+3 if -2<=x<1 9 if x=1 -x+2 if x&...
- pre-calculus - R(x)=x^2+x-6 ________ x-3 1. find the domain and y-intercepts 2. ...
- Math Analysis - 4. Find f(x) + g(x) when f(x) = x^(1/2) and g(x) = 6x^(1/2...
- Algebra - 13. Find the domain of y=2x+1 Bobpursley said: The domain of x is not ...
- PreCalculus - I'm trying to find the x-intercepts of a polynomial function = 4x^...
- Algebra 1a - Find the domain of the function g(x)= 1/6-5x I know that x is a ...
- aLGEBRA - Find the domain of the function g(x)= 1/6-5x I know that x is a real ...
- maths - For the following graph: a. Find the domain of f. b. Find the range of f...

More Related Questions