Calculate (k-j)(x)
j(x)=6x^2-8x
k(x)=3x^2-x+7

Go to Answers.com it will show you the answer

Step-by-step explanation:

a.for lorena 14 hours makes $126   for 16 hours she makes 144

for julie 6 hours makes $72 for 21 hours its $252

b. julie makes more money than lorena julie makes $12 an hour and lorena makes $9  

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then