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At a bake sale, David bought 3 tarts and 5 cookies, and paid $10.50. At the same prices, Lisa bought 4 tarts and 8 cookies, and paid $14.80. What was the price of a tart and the price of a cookie?
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Jan 24, 2022
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At a bake sale, David bought 3 tarts and 5 cookies, and paid $10.50. At the same prices, Lisa bought 4 tarts and 8 cookies, and paid $14.80. What was the price of a tart and the price of a cookie?
Mathematics
high-school
Max Podgorny
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T = Tarts
C = Cookies
David:
3T + 5C = 10.50
Lisa:
4T + 8C = 14.80
Setup as system of equations and use substitution or elimination
Elimination is easier for this case but either will give you the right answer I worked it both ways
T= cost of tarts = $2.50
C= cost of cookies = $0.60
Onassis
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Jan 31, 2022
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Onassis
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