Two ways to divide 3 and 45 and get at least 9

Is a positive integer raised to a negative power always positive

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.