Ms Cunningham has 7 packages of m&ms and 23 other m&ms. let n = the number of m&ms in one package.

a. write an expression to show how many m&ms Ms. Cunningham has

b. Each package cointains 57 erasers. Use substitution to show how many erasersMs. Cunningham has

c. aevaluate your expression

a. To calculate the total number of M&Ms Ms. Cunningham has, we need to add the 7 packages of M&Ms to the 23 other M&Ms. Since each package contains 'n' M&Ms, the expression will be 7n + 23.

b. Since each package of M&Ms contains 57 erasers, we can substitute 'n' in the expression from part a with 57. So the expression becomes 7 * 57 + 23.

c. To evaluate the expression, we substitute 'n' with the given value of 57 and perform the calculations. It would look like this: 7 * 57 + 23 = 399 + 23 = 422. Therefore, Ms. Cunningham has a total of 422 M&Ms.