When using formal problem-solving strategies, we (a) must ...

[Ebrown]

When using formal problem-solving strategies, we
 
  (a) must choose the right one for the problem.
  (b) should not mix them in one problem.
  (c) should always start by choosing a variable.
  (d) are using deductive reasoning.
  (e) None of these answers is always true.

Question 2

Which of the following are simple closed curves?
 
  (a) A circle.
  (b) A polygon.
  (c) A cube.
  (d) Both (a ) and (b) are correct.
  (e) Both (a ) and (c) are correct.

[helenmarkerine]

Answer to Question 1

e

Answer to Question 2

d

[Ebrown]

Thanks for the timely response, appreciate it

[isabelt_18]

Gracias!