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)= 
Answer:
Because the kind of compounfds that you try to determine using paper chromatography (organic compounds) are usually not soluble in water. Furthermore, water could react chemically with some of this compounds, because it's a very reactive molecule. You need organic solvents that are mostly inert.
Answer:
x = 53
Step-by-step explanation:
Remember that the sum of all 3 interior angles in a triangle is 180∘ so
74 + x + x = 180
74 + 2x = 180
2x = 180 - 74
2x = 106
x = 106/2
x = 53
Answer:
64.43 cm2 :)
Step-by-step explanation:
look and download the file i gave to u
Add 5 on both sides
Make the denominators the same
Multiply 13 on both sides
=>
=
=>
=>
=>
