What are the coefficients for the binomial expansion of (p+q)^7

What is the square root of 45? (step by step working plz)

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

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.