Answer:
i think its A....................
There are mnemonic acronyms out there for reminding you how to do this. I think of it simply as using the distributive property.
(4x-3)(x+5) = 4x(x+5) -3(x+5)
then again
= (4x² +20x) + (-3x -15)
= 4x² + (20-3)x -15 . . . . . . . combine like terms
= 4x² +17x -15
To do this problem, you need to use the Pythagorean thermion I think.
Here is what I got as an answer
22.5 km
You multiply what’s on top of that
