One window washer starts at 21 ft. high, rising 8 inches per second. the other window washer starts at 50 ft. high, descending 11 in. per second. how long does it take for the two window washers to reach the same height?

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

your answer would be 10x - 1

just needed some points but try socratic

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this