Find a number that is 4 more that is 4 more than 6 plus 4

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?