Solve the system of linear equations below. x - 3y = -3
x + 3y = 9

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details