N; n+1; n+2 - 3 consecutive numbers
n(n + 1) = (n + 2)² - 19 |use a(b + c) = ab + ac and (a + b)² = a² + 2ab + b²
n² + n = n² + 4n + 4 - 19 |subtract n² from both sides
n = 4n - 15 |subtract 4n from both sides
-3n = -15 |divide both sides by (-3)
n = 5
n + 1 = 5 + 1 = 6
n + 2 = 5 + 2 = 7
Answer: 5; 6; 7.
Answer:

Step-by-step explanation:
Given



Required
Solve for x
Since B is in between both points, then:

This gives


Divide by 3

Answer:
5x + 2x + 7x
Step-by-step explanation:
3 seats x 15 rows = 45 total seats
45 seats x $74 = $3,330.00 total cost
You will need to add all the dimensions together, also know as perimeter