Samantha sends her son, barry, to a preschool center on certain days. the cost of preschool is $45 per day along with a fixed monthly charge of $70. last month, samantha paid a total of $880 to the preschool center. let d represent the number of days barry spent at the preschool center last month. which equation represents this situation, and how many days did barry attend preschool last month? a. 880 = 90d + 45; 9 days b. 810 = 45d; 19 days c. 880 = 70d - 45; 21 days d. 880 = 45d + 70; 18 days

Step-by-step explanation:

We are given fixed monthly charge = $70.

The cost of preschool per day = $45.

Number of days = d.

Total cost of d days = cost per day × number of days + fixed monthly charge.

Therefore, we get equation

880 = 45×d+70

Now, we need to solve the equation for d.

Subtracting 70 from both sides, we get

880-70 = 45d +70-70

810=45d

Dividing both sides by 45, we get

18=d.

Therefore, 18 days Barry attended preschool last month.

Therefore, correct option is D option.

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step-by-step explanation: