Pls help
-21 ÷ b = 3, b = ? and uhm this one too
3c + 1 = 10, c = ?

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25