Question 3 is D) 2r + 1.6b = 10. Since Rice costs $2 and Beans $1.60, you’ll have to multiply the cost by how much you can buy. Since we don’t know how much, we use r and b.
Question 4’s answer is 1 pound of Rice. 5 * 1.60 equals 8 dollars and since rice is 2 dollars per pound, in order to pay with 10 dollars, Lin will have to buy only ONE pound of Rice.
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