Evaluate the expression below if x = -2, y=3, and z= -4 8xy
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Answer:
Janet has coins worth 252.5, 101, and 50.5.
Step-by-step explanation:
Let us call the three coins , and
.
The first coin is 5 times another coin<em> (let's say </em>
); therefore,
,
and the third coin is 2 times the value of another coin<em> (it's coin </em><em>):</em>
<em /><em>.</em>
The total worth of all coins is 404; therefore,
or
with the value of in hand, we find
and
:
and for
Thus, Janet has 3 coins worth 252.5, 101, and 50.5.