brewerroserb
05.01.2020 •
Mathematics
Scott's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs scott $5.40 per pound, and type b coffee costs $4.30 per pound. this month, scott made 176 pounds of the blend, for a total cost of $842.60 . how many pounds of type b coffee did he use?
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Ответ:
a+b=176 subtract b from both sides
a=176-b and we are also told:
5.4a+4.3b=842.6, using a found above, this equation becomes:
5.4(176-b)+4.3b=842.6
950.4-5.4b+4.3b=842.6 combine like terms on left side
950.4-1.1b=842.6 subtract 950.4 from both sides
-1.1b=-107.8 divide both sides by -1.1
b=98
So Scott used 98 pounds of type B coffee.
Ответ:
6x = 108
x = 18 degrees