Final answer:
The value of x cannot be determined from the given information and figure.
Step-by-step explanation:
Based on the given information and figure, we have DG = 60 ft. To determine the value of x, we need to use the information provided in options a) 4x-3 and b) 2x + 21.
Option a) 4x-3 represents a linear equation. However, the value of x cannot be determined from the given information and figure. Therefore, option a) cannot be used to find the value of x.
Option b) 2x + 21 also represents a linear equation. Like option a), the value of x cannot be determined from the given information and figure. Therefore, option b) cannot be used to find the value of x either.