SOLUTION: Write a system of linear equations to represent the situation. Then, answer the question using (a) a table, (b) a graph, and (c) algebra.
2. You buy 16 candles. Large candles c
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-> SOLUTION: Write a system of linear equations to represent the situation. Then, answer the question using (a) a table, (b) a graph, and (c) algebra.
2. You buy 16 candles. Large candles c
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Question 1073089: Write a system of linear equations to represent the situation. Then, answer the question using (a) a table, (b) a graph, and (c) algebra.
2. You buy 16 candles. Large candles cost $7 each and small candles cost $3 each. You spend $76. How many large candles x and small candles y did you buy?
Number of candles: Number of large candles plus number of small candles is 16.
Cost of candles: $7 times number of large candles plus $3 times number of small candles is $76 Answer by ikleyn(52781) (Show Source):
You are on the right way:
L + S = 16 (1) (large candles and small candles)
7L + 3S = 76 (2) (dollars).
Express L = 16 - S from (1) and substitute it into (2), replacing L.
You will get a single equation for S:
7*(16-S) + 2S = 76.
Can you complete on your own from this point ?
