Answer:
I don't understand the first one
Answer:
f(5)= 78.5. I hope this helps!!
Answer:
10x + 6y
Step-by-step explanation:
Let t = length of the third side
3x + 4y + 5x - y + t = 18x + 9y
8x + 3y + t = 18x + 9y
t = 10x + 6y
Yes is the correct answer
