7(8x - 6y + 9) = i need help on this one

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

The radius of a sphere is 3 inches. which represents the volume of the sphere?