Final answer:
The equation w/-2.1 + 18 = -12 is solved for w, giving w = 63. Without additional information relating a to w, we cannot determine the value of a/-2.1, and none of the options presented (A-D) can be confirmed as correct.
Step-by-step explanation:
To solve the equation w/-2.1 + 18 = -12, first subtract 18 from both sides of the equation to isolate the variable term:
w/-2.1 = -12 - 18
w/-2.1 = -30
Next, multiply both sides by -2.1 to solve for w:
w = -30 × -2.1
w = 63
Now, we must determine what a/-2.1 equals. Since we know the value of w, if we assume a relationship between a and w, such as a = w, then:
a = 63
a/-2.1 = 63/-2.1
a/-2.1 = -30
However, the question does not provide enough information to determine the exact value of a because there's no given relationship between a and w. Therefore, we cannot find a definitive answer using the provided information, and none of the options A-D can be confirmed as correct.