| A 5-minute international call costs $2.15 and a 12-minute
call costs $3.06. The work shows how to write an
equation where x represents the number of minutes, and
y represents the total cost of an international call.
Analyze the steps of the work to determine if the
equation is correct.

In step 2, she substituted the x values for y and the y values for x.

Step-by-step explanation:

just did it

£56

step-by-step explanation:

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb