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spotty1023
06.12.2019 •
Mathematics
How many pounds of peanuts costing $1.90/ib and raisins costing $2.50/ib should mr. bruckner mix to make 12 ib of a trail mix that costs $2.05/ib
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Ответ:
p+r=12, p=12-r
We are given that:
(1.9p+2.5r)/12=2.05, using p found above in this equation:
(1.9(12-r)+2.5r)/12=2.05 perform indicated multiplication on left side
(22.8-1.9r+2.5r)/12=2.05 combine like terms on left side
(22.8+0.6r)/12=2.05 multiply both sides by 12
22.8+0.6r=24.6 subtract 22.8 from both sides
0.6r=1.8 divide both sides by 0.6
r=3, and since p=12-r
p=12-3
p=9
So Mr. Bruckner will need to mix 9 pounds of peanuts with 3 pounds of raisins to make a 12 pound mixture which costs $2.05 per pound.
Ответ:
JOE
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Step-by-step explanation: