Find common denominators
2/20+3/20
then multiply 3x4=12/20
then 2x5=15/20
last add that 27/20
Answer:
55.56%
Step-by-step explanation:
= (20 / 36) × 100
= 0.56 × 100
= 55.56%
<span>2cos2x/sin2x=cotx-tanx
2cos2x/sin2x = 2(cos²x-sin²x)/(2sinx*cosx) = (2</span>cos²x-2sin²x)/(2sinx*cosx) =
= 2cos²x/(2sinx*cosx) - 2sin²x)/(2sinx*cosx) = cos x/ sin x - sinx/cos x =
= cot x-tan x
Left side is equal to right side, so 2cos2x/sin2x=cotx-tanx is true.
The second one I believe is correct. It is saying if you add 11 to johns age it is equal to 5 times his age minus 5
Take the 30 and divide it by 100 and you get the percent.
Ex. 30/100 = .3
Then multiply 64 by the percent.
64 x .3 = 19.20