The multiplication sign because "6 teaspoons of flour per pancake (6x) 10 pancakes she want to make (6x10=60) 60 tablespoons of flour!
The value of m is -30 because once you get m on the one side the equation is 3m=-90 and once you divide -90 by 3 you get m=-30.
f(x) = 2x + 1 and g(x) = f(x) + 3
g(x) = 2x + 1 + 3
<h2><u>g(x) = 2x + 4</u></h2>