A

3(15x)

B

15x−45

C

15x+45

D

45−15x

Step-by-step explanation:

U ={january,february,march,april,may,june,july,august,september,october,november,december}

A={january,june,july}

B={october,november,december}

C={

B 15x - 45

Step-by-step explanation:

let x be the charge for each cake

profit is equal to sale amount minus expenses

each cake she earns x - 3

In a month she sold 15 cakes

Total profit in a month is:

15 (x - 3)

Multiply

15x - 45

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