Answer:
3
Step-by-step explanation:
Answer:
looks like 9.5, but kinda hard to tell
4(-5y) + 2y = 180
-20y + 2y = 180
-18y = 180
y = -10
x = 50
3^2+1+4=14 the answers 14
Answer:
b. -36/77
Step-by-step explanation:
As 0 < x <
/2 => tan x > 0
As 0< y <
/2 => tan y > 0
We have the formula:
As tan x = 1/(cotx) => 
As tan x > 0 => tan x = 8/15
As tan y > 0 => tan y = 4/3
As tan (x-y)=