Asked by Tazzy
A coffee blender mixes 2 types of coffee. Type A costs $13 per kg and type B costs $18 per kg. How many grams of each type of coffee must be blended so that 1 kg costs $15?
Answers
Answered by
bobpursley
a,b means the weight of each .
13a+18b=(1)15
and a+b=1
multiply second equation by13 and subtract it from the first
13a+18b=(1)15
13a+13b=13
and then
5b=2 or b= .4kg, and then a=.6kg
13a+18b=(1)15
and a+b=1
multiply second equation by13 and subtract it from the first
13a+18b=(1)15
13a+13b=13
and then
5b=2 or b= .4kg, and then a=.6kg
Answered by
Anonymous
can U explain where the one comes from
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