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a restaurant sells slices for $2 and calzones for $3. on monday, a total of 54 slices and calzones were sold, and the cashier collected a total of $120 from sales of slices and calzones. let x represent the number of slices and y represent the number of calzones. which system of equations represents the situation?

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,