McGraw Hill Glencoe Algebra 1, 2012
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McGraw Hill Glencoe Algebra 1, 2012 View details
3. Solving Multi-Step Inequalities
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Exercise 40 Page 301

Which inequality sign would you use to describe the relationship between the cost of the items and the amount of money Benito can spend?

4

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We are told that Benito has $6 to spend. Therefore, the total cost must be less than or equal to $6. To show this, we will use a non-strict inequality. Total cost≤ 6 Let x represent the number of toppings Benito can order. The product of x and the price of a single topping, $0.65, is the cost of the toppings. We also know that the cost of a sundae without any extra toppings is $3.25. Cost of the sundae:& 3.25 Cost of the toppings:& 0.65x The total cost will be the sum of the two costs stated above. Total spent≤ 6 ⇕ 3.25+ 0.65x ≤ 6 Finally, let's calculate the greatest number of toppings Benito can buy. To do so, we will solve the inequality for x.
3.25+0.65x≤ 6
0.65x≤ 2.75
x≤ 2.75/0.65
t≤ 4.230769 ...
The greatest number of toppings Benito can buy is approximately 4.23. Since he cannot buy a fraction of a topping, we have to round this number down to the nearest whole number, 4. Therefore, the greatest number of toppings Benito can buy is 4.