Mathematics, 12.11.2019 08:31 xaviuzc
Zach and roger spent a total of 69 hours building a treehouse. roger worked 9 hours less than twice the number of hours zach worked. which system of equations can be used to determine the number of hours zach worked, x, and the number of hours roger worked, y?
a.
x + y = 69
2x + y = 9
b.
x - y = 69
y = 2x + 9
c.
x + y = 69
y = 9x - 2
d.
x + y = 69
y = 2x - 9
Answers: 3
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Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?
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Zach and roger spent a total of 69 hours building a treehouse. roger worked 9 hours less than twice...
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