- Given -5(4x+6)<-18 x+6+4x
- Distributive Property Of Equality -20x - 30 < -18x + 6 + 4x
multiply -5 to 4x and 6, so you've got -20x - 30
- Combine Like Terms -34x - 30 < 6
add all the numbers that has a variable, (-20x) + (-18x) + 4, so you've got -34x
- Addition Property of Equality -34x < 36
add 30 on both sides like this, -34x -30+30 < 6+30
- Division Property of Equality x > -1.1
divide -34 ;like this, -34x/-34 < 36/34
so the answer is x > -1.1
Classic trigonometry:
theta is 60
adjacent side is 10
find opposite side
soh cah toa
sin cos tan
use tangent
tan = O/A
so tan(60) = O/10
multiply by 10 each side
10tan(60) = O
Opposite = 17.32"
thats your change in elevation