A woman is selling peanuts and cashews, cashews for 8 dollars a pound and peanuts for 3 dollars a pound. She wants to make a mixture that costs 4 dollars a pound. If she uses 10 pounds of peanuts, how much will the total mixture weigh?

Question

anonymous · Answer

solve 
$$30+8x=4(10+x)$$ for x

amistre64 · Answer

why is first place "pee yellow"?

anonymous · Answer

reasoning that the 10 pounds of peanuts are $3 a pound and the cashews are $8
and the total will be 10 + x

anonymous · Answer

color changes constantly

anonymous · Answer

sometimes yellow, sometimes grayed out, and different shades of red ishness

anonymous · Answer

i miss the jiggle effect though.  what happened to that???

anonymous · Answer

mixture will weight 12.5 pounds

anonymous · Answer

I know the answer is 12.5, but can someone show me the right equation? If the top one is used, x=-2.5 and the total mixture wouldn't weigh 12.5, right?

anonymous · Answer

lets suppose in 1 pound mixture x kg is peanut and 1-x kg is cashew so
x*3+(1-x)*8=4 by solving we get x=4/5 that means 4/5 kg of peanuts and 1/5 kg of cashew that means 4 times more peanuts then cashew so while there is 10 kg of peanut then there will be 10/4 kg of cashew so 10+10/4=12.5pounds