11+5+3x2+8x1=
what is the answer?

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

How do you determine if an ordered pair is a solution to a given equation?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.