The 1st row has 15 chairs.
The 2nd row has 15 + 3 = 18 chairs.
The 3rd row has 18 + 3 = 15 + 2•3 = 21 chairs.
The 4th row has 21 + 3 = 15 + 3•3 = 24 chairs.
The pattern continues, so that the n-th row has 15 + (n - 1)•3 = 3n + 12 chairs.
If there are 15 rows, then the total number of chairs is
where we use the formulas
Answer:
Scholastic Aptitude Test
Explanation:
It stands for "Scholastic Aptitude Test"
They both offer checking and savings accounts, mortgages, loans on homes and autos. These things are the things that they have in common.
Answer:
About 24 different ways.
Explanation:
1. Juice, chicken, pie 5.Coke, chicken, pie 9.Tea, chicken, pie
2.Juice, beef, pie 6.Coke, beef, pie 10.Tea, beef, pie
3.Juice, pork, pie 7.Coke, pork, pie 11.Tea, pork, pie
4.Juice, fish, pie 8.Coke, fish, pie 12.Tea, fish, pie
13. Juice, chicken, cake 17.Coke, chicken, cake 21.Tea, chicken, cake
14.Juice, beef, cake 18.Coke, beef, cake 22.Tea, beef, cake
15.Juice, pork, cake 19.Coke, pork, cake 23.Tea, pork, cake
16.Juice, fish, cake 20.Coke, fish, cake 24.Tea, fish, cake
Not sure if I can include more than one drink, or main course for a meal, If I can could you let me know, so i can add more to this answer.