Plug in 0 for x and you get 5. Which is your answer :)
True because a triangle must have 3 angles that add up to 180 degrees and, since a right angle is 90 degrees, it cannot have 2 right angles
I don't know about the first one but for the second one:

<span>$20/16=$1.25/candy bar
Candy bars cost $1.25 each </span>