Question

Make an expression for the total cost to buy $4 of fruit per pound in 10 granola bars that cost $2 each. The expression I wrote is 4x + 1 y = 48. If I did that right, I need this written into an inequality. I also need an inequality that models a number of granola bars I need to buy, which I need to buy 10 granola bars.

A) 4x + y ≥ 48
B) 4x + y = 48
C) 4x + y < 48
D) 4x + y ≤ 48

Answer 1

To calculate the total cost of buying $4 of fruit per pound in 10 granola bars that cost $2 each, use the expression 4x + y = 48. Write it as an inequality by using greater than or equal to (≥) or greater than (>). The inequality that models the number of granola bars needed to buy is x ≥ 10.

Step-by-step explanation:

To calculate the total cost of buying $4 of fruit per pound in 10 granola bars that cost $2 each, we need to multiply the cost of fruit per pound by the weight of the fruit and then multiply by the number of granola bars.

The expression 4x + y = 48 is correct, but it is not an inequality. To write it as an inequality, we need to use either greater than or equal to (≥) or greater than (>) sign since we are trying to find the minimum cost. Therefore, the correct inequality is 4x + y ≥ 48.

The inequality that models the number of granola bars you need to buy is simply x ≥ 10, since you need to buy at least 10 granola bars.