Evaluate the numerical expression.

9 × [(25 − 6) − (6 + 5)]

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10