Write -9 7/10 as a decimal number

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.