Answer:
try to do it on your own
but i will still explain yoh wait just a minute
I believe it is 8x.
Use the formula A=1/2(b*h)
A=1/2(4x(5x-1))
A=1/2(20x-4x)
A=1/2(16x)
A=8x
Answer:
3, 5, 10, 15
Step-by-step explanation:
I hope its help
Here is my answer. I hope this is helpful.