a number is multiplied by 3 and then 7 is added.The result is doubled ,giving the answer 80.Using n to represent the original nu
1 answer:
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Answer:
Independent variable: b - books
Dependent variable: w - weeks
graph attached
Step-by-step explanation:
b = 2w + 3
b = total number of books collected
w = is the number of weeks
So, the number of books depend on the number of weeks, so
Independent variable: b - books
Dependent variable: w - weeks
Let be the amount of the 30% alloy and
the amount of the 60% alloy the metalworker will use. However much is used, the final alloy will have a mass of
kilograms. For each kg of the 30% alloy used, 0.3 kg is copper; similary, each kg of the 60% alloy contributes 0.6 kg, so that
Now,