Please can someone help me with this?​

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Aquadrilateral has exactly 3 congruent sides davis claims that the figure must be a rectangle why is his claim incorrect.

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)