Double and Half angles identities, please help

Use the expression below.–4b + 8c + 12 – 8b – 2c + 6part asimplify the expression. enter your answers in the boxes. b + c + part bfactor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3)part cwhat is the value of the expression when b = 2 and c = –3? enter your answer in the box.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)