Two more than three times a number

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges