Hoi!
If the two fractions have a common denominator, then yes, you do. Only add the numerators. :)
Answer:
-1
because you are adding up to 0 to get back to the positive.
Theorem: If two chords intersect within a circle, then the product of the lengths of the segments (parts) of one chord is equal to the product of the lengths of the segments of the other chord.
In your case this theorem sounds as

Solve this equation:

Answer: correct choice is C.
Answer:
29 square = 20 square+ b square
b= 21
She packed 3 layesr hope this helps