Answer:
6x - 12 + x = 9
6x + x - 12 = 9
Collect like terms
7x - 12 = 9
Add both sides 12
7x - 12 + 12 = 9 + 12
7x = 21
Divide both sides by 7
7x ÷ 7 = 21 ÷ 7
x = 3
8m
Step-by-step explanation:
x = hypotenuse since they want the point of observation to the top of the tree
cos 60 = 4/x
x = 4 / cos 60
x = 8m
I think is D because u are putting the opposite in the first solutions u got a positive equation so for the other solutions i think u maybe are going to got the opposite I may be wrong But I just trying to help so sorry if u got it wrong
