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If you can't open them, I'll type them out for you. My HW website won't let me copy and paste.

I can't open the file...

evidently the line through (7,7) meets y = x at (7,7) !!

for #20 you have to decide which rule to use. since
\[-1\leq 2\] you know
\[f(-1)=2\times -1=-2\]

since
\[x>2\] =you use
\[f(3)=6\times 3^2+3+4\]

and since
\[2 \leq 2\] is true you use
\[f(2)=2\times 2=4\]

o sorry, didnt see u solved #18 too cause u didnt put the # in front of it.

so how did u get those numbers for #18? im a little confused on that

and for #20 i got -2, 61, and 30 but those are wrong... why?

Do you know how to find the points where the parabola crosses the x axis?

no...

If a point is on the x axis, the y value is 0 so set y = to 0 and solve

so i would get plus minus radical 3

Yes. So the parabola crosses the x axis at (sqrt3,0) and (-sqrt3,0)

distance formula

yep

what was that again?

cant keep track of all the formulas

\[d=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}\]

Thanks a lot!

|dw:1327017935457:dw|

Did you get it

im getting a decimal when i subtract - radical 3 and radical 3

im using my calc btw

ok nvm