802.4 divided 1.7

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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

Evaluate the expression. (9 + 5)(3 + 2)0

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab