Who killed Mr PEMDAS?

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

What is the ratio of the length of an object in yards to the length of the same object in miles?