Answer:
84
Step-by-step explanation:
A rhombus has parallel sides so it's simply
24+24+18+18=84
Substitute n = 1, n = 2, n = 3 and n = 4 to the equation f(n) = n² - 1:
f(1) = 1² - 1 = 1 - 1 = 0
f(2) = 2² - 1 = 4 - 1 = 3
f(3) = 3² - 1 = 9 - 1 = 8
f(4) = 4² - 1 = 16 - 1 = 15
-6
Step-by-step explanation: dont know, did math. this is the answer on edge
