(8-4x+2y)-(20+4x-4y)
-12-8x+6y or -8x+6y-12
<span>Note D = r(t)
20min = 1/3 hr and 10min = 1/6 hr
(1/3hr)30mph + (1/6hr)3mph = 10.5 mi, the total distance traveled.
total distance / total time = average speed = 10.5/(1/3 + 1/6) = 10.5/(2/6 + 1/6)
10.5mi/.5hr = 21mph
Hope This Helps
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E / c^2 = M.
to solve it, I just divided by c^2 on both sides because of the division property of equality.
So there are 38 +32 = 70 and for the rest 30 we can assuming 15 + 8 +7
38+32+15+8+7=100
hope this will help you
