Please help quickly I will give you brainliest

It is not a right triangle because 21^2+28^2 is not equal to 36^2

[a^2+b^2 must equal c^2)

]

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

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