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?

The equation is:  

Barry attended preschool for 18 days last month.

Step-by-step explanation:

The number of days, Barry spent at the preschool center last month is .

The cost of preschool is $45 per day. So, the total cost for days

Fixed monthly charge is $70.

So, the total charge of last month  

Given that, Samantha paid a total of $880 to the preschool center last month.

So, the equation that represents the situation:  

Solving the above equation, we will get........

So, Barry attended preschool for 18 days last month.

15.5

step-by-step explanation:

5

∑

n = 1

substitute n = 1, 2, 3, 4, 5 and sum the terms

= + + + 2² + 2³

= 0.5 + 1 + 2 + 4 + 8

= 15.5

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.