Answer:
a-b=12
Step-by-step explanation:
(a²-b²)/(a+b) = 12
(a-b)(a+b)/(a+b)=12
See graph
-4°Fahrenheit
10-7=3 3-7=-4
96 → B
substitute w = 12 into the equation D = 3w + 60
D = (3 × 12 ) + 60 = 36 + 60 = 96
