If you do not have equal coefficients for both variables, can you
still use the elimination method?

Yes

Step-by-step explanation:

Multiply one eqution so that they are same.

For example:

2x+17y+48=0

x+8y-6=0    --> multiply 2 times, so  2x+16y-12=0

and now you can use it as if they are coefficients for both variables

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).