Can someone please help

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.