If there are twice the dolphins as whales and 8 fewer sharks than dolphins and whales combined then the expression which represents the number of sharks be 3w-8.
Given that there are twice the dolphins as whales and 8 fewer sharks than dolphins and whales combined.
We are required to find the expression which shows the number of sharks.
We are given that the number of whales be w.
let D shows dolphins and S shows sharks.
According to the question,
D=2w----------1
S=(D+w)-8-------------2
Use the value of D from 1 in 2.
S=2w+w-8
S=3w-8
Hence if there are twice the dolphins as whales and 8 fewer sharks than dolphins and whales combined then the expression which represents the number of sharks be 3w-8.
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