Kevin plants corn and cotton. Once he harvests the crops, he has 30 pounds of corn and x
pounds of cotton. Corn sells for $5 per pound and cotton sells for $10 per pound. If Kevin sells
all his corn and cotton for a total of $640, then compute x.
Pick:
A) 39
B) 49
C) 59
D) 69
E) 79
Kevin sells his corn for 305 dollars and his cotton for x10 dollars. Thus 30-5+x*10 =   640, so x = 640-30*5/10 = 490/10= 
<gadget id="calculator">490/10</gadget>
<output>49</output>
49 .   correct answer 49
<result>B</result>
Kevin plants corn and cotton. Once he harvests the crops, he has 30 pounds of corn and x
pounds of cotton. Corn sells for $5 per pound and cotton sells for $10 per pound. If Kevin sells
all his corn and cotton for a total of $640, then compute x.