Final answer:
To find the value of C, substitute A and B into the equation. When Z=4, X=8 and Y=7.
Step-by-step explanation:
To find the value of C, we need to substitute the given values of A and B into the equation for C. Since A=2 and B=3, we have C = A + B = 2 + 3 = 5.
To complete the formulas for X and Y when Z=4, we substitute the values of A, B, and Z into the formulas for X and Y. X = A * Z = 2 * 4 = 8, and Y = B + Z = 3 + 4 = 7.