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alexandr1967 [171]
3 years ago
5

A coffee stand sells cups of coffee for $6 and cups of tea for $3 . Tuesday, a total of 75 cups were sold, and the total money c

ollected was $312 . How many cups of coffee and how many cups of tea were sold?
Mathematics
1 answer:
gtnhenbr [62]3 years ago
5 0
C + t = 75......c = 75 - t
6c + 3t = 312

6(75 - t) + 3t = 312
450 - 6t + 3t = 312
-6t + 3t = 312 - 450
-3t = - 138
t = -138/-3
t = 46 <=== 46 cups of tea were sold

c = 75 - t
c = 75 - 46
c = 29 <=== 29 cups of coffee
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Step-by-step explanation:

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zheka24 [161]

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EXPLANATION

From the question we have that,

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This forms a geometric sequence,

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The first term of this sequence is

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To find the 15th term, we plug in a=1, r=2 and n=15.

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