Solve the expressions when a = 9 and b = -3. Enter your answers in the boxes below.
A. -3b
B.
+2=
b

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Need solving this 2nd limit problem.