D is not an ordered pair.
Answer:
width = 6 feet
length = 19 feet
Step-by-step explanation:
'w' = width
'2w+7' = length
50 = 2w + 2(2w+7)
50 = 2w + 4w + 14
36 = 6w
6 = w
length = 2(6)+7 = 19
The answer is 325, 20 + 205 + 100 = 325
Multiplying a negative number and another negative number makes the product positive.
So (-2.1)*(-1.4) = 2.94
