<span>The opposite sides are parallel.
</span><span>Their angle measures add to 360°.</span>
Answer:
21
Step-by-step explanation:
since its a rectangle there are two lengths of six. If you add them together you get 12. subtract the total perimeter of 54 by the 12 and get 42. Since there is 2 sides left divide by 2. You should get 21 for the width of the rectangle
Answer: The answer is A.
Step-by-step explanation:
So basically what you have to do is
Answer:

Step-by-step explanation:

short explanation: 1) to add the 1st equation to the 2d; 2) to calculate the value of 'x', then to substitute x=13/5 into the 2d equation and calculate the value of 'y'.