Tom is correct, and Dan is wrong. A quadrilateral is a closed figure with four sides, for example, like a kite. A parallelogram is a four sided rectangular figure with opposite sides that are parallel.
Answer:
x= -0.2 or -1/5
Step-by-step explanation:
42+5X=41
Subtract 42 from both sides:
42+5X=41
-42 -42
You are left with:
5x=-1
Now divide 5 by both sides to isolate x:
5x= -1
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5 5
x=-0.2 or -1/5