1) Find the equation of a circle whose center is at (-2,-5) and
radius 4.

Step-by-step explanation:

eq. of a circle is (x-h)²+(y-k)²=r²

where center=(h,k)

and radius=r

so (x+2)²+(y+5)²=4²

correct answers below:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb