Someone plz explain why i got these wrong! i don't understand it. ignore my writing

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

it would be 0.18 because when the other choices are converted they equal those two numbers.   hope this !

0.4 liters = 400 milliliters (multiply the volume value by 1000 and it give you the answer). hope this ! ^-^