What is 5c-4c+c-3c and 3a+6+5a-2 and 8b+8-4b-3?

Use the distributive law to multiply. 3(4x + 5y + 6)

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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.