Pls

If square root x = -7, then x= -49 true or false

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3

If sin(x) = 0 and cos(x) = 1, what is tan(x)?