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Mathematics
Zander Pierce
25 December, 23:13
Evaluate 5c+cd when c=1/5 and d = 15
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Lilia Cooley
25 December, 23:26
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Answer: 4
Step-by-step explanation: Here we're asked to evaluate 5c + cd given that c = 1/5 and d = 15.
So all we have to do is plug our given values for c and d into the problem and simplify from there.
5c would be 5 (1/5) + c which is 1/5 · d which is 15 so we have (1/5) (15).
So rewriting our problem we have 5 (1/5) + (1/5) (15).
Simplifying from here, remember that our order of operations tells us we must first multiply 5 (1/5) and (1/5) (15).
So multiplying 5 (1/5), the 5 and 5 cross cancel
to 1 and 1 so we have 1 · 1 or 1.
Next we have (1/5) (15) which we can rewrite as
(1/5) (15/1) which is 15/5 or 3.
So we now have 1 + 3 which is 4.
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