Help needed . need help finding the range , and the iqr .

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What is the least common factor of 6 and 8

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10