6(x+7)-20=6xx-4-3x=-2x-3-1-2(x+2)=-2x+12(x+4)-5=2x+3
1 answer:
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Solution :
Give that a shark can chase prey about 30 miles per hour.
1 hour = 60 minute
by using unitary method, we will convert miles per hour into miles per minute
in 60 minutes the shark can chase the prey 30 miles
In 1 minute the shark can chase
Hence the shark can chase the prey about 0.5 miles per minute.