Is 0.45545455545… a rational or irrational number?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

The value √10 and √15 are plotted on the number line