Answer:
2 - 
Step-by-step explanation:
Using the addition formula for tangent
tan(A - B) = 
and the exact values
tan45° = 1 , tan60° = , then
tan15° = tan(60 - 45)°
tan(60 - 45)°
= 
= 
Rationalise the denominator by multiplying numerator/ denominator by the conjugate of the denominator.
The conjugate of 1 + is 1 -
= 
← expand numerator/denominator using FOIL
= 
= 
= 
+ 
= 2 -
Answer:
C and D
Step-by-step explanation:
You can tell if equations have no solution if the variables on both sides of the equation are the same.
Choice C is 10+6x=15+9x-3x. You would combine 9x and -3x, turning the equation into 10+6x=15+6x. Since there is a 6x on both sides, Choice C would have no solution.
The same for Choice D. When you simplify everything there is a 3x on both sides, so it would have no solution.
Answer:
plug in -6
-(-6) - 3
the 6 turns into a positive
subtract 3 from 6
= 3
Step-by-step explanation:
1)a) 925×4.25=3931,25
b) 1806.25:4.25=425
I don't know second one.
3)a 55×1.12=61.6
b)
Answer:
It takes Neptune 165 earth years to orbit the sun.
Vatican City is the capital of the Vatican City state situated within the Italian city of Rome. It occupies an area of only 0.17 square miles making it the world's smallest state by land area.
The battle of Hastings took place in a small town called; Battle in East Sussex, England.
Step-by-step explanation:
