Answer: 0.43
Step-by-step explanation: if you ever need help like this for percentages again i just use this website its reallyyyy helpful :) https://percentagecalculator.net/
Answer:
1 newspaper is 3 dollars
Step-by-step explanation:
the ratio 5:15 is equivalent to 1:3
Answer:
Step-by-step explanation:
The higher standard deviation of any data represents diversified data or data having more scattered value . Average value may be same for two samples of data having different standard deviation . So option one is incorrect. 3 rd option is also incorrect.
The scores of the second test were more widespread than the first , because its standard deviation is more for second test. option 2 is in- correct .
none is correct.
Answer:
x > -2
Step-by-step explanation:
3x>-6
Divide each side by 3
3x/3 > -6/3
x > -2
3.) 3sinθ = sinθ - 1
3sinθ - sinθ = -1
2sinθ = -1
sinθ = -1/2
θ = sin^-1(-1/2) = π + π/6, 2π - π/6 = 7π/6, 11π/6
4.) tan^2 θ = -3/2 sec θ
sin^2 θ / cos^2 θ = -3/2(1/cos θ)
sin^2 θ / cos θ = -3/2
1 - cos^2 θ = -3/2 cos θ
cos^2 θ - 3/2 cos θ - 1 = 0
2cos^2 θ - 3cos θ - 2 = 0
2cos^2 θ - 4cos θ + cos θ - 2 = 0
2cos θ (cos θ - 2) + 1(cos θ - 2) = 0
(2cos θ + 1) = 0 or (cos θ - 2) = 0
cos θ = -1/2 or cos θ = 2 [but cos θ can never be 2]
θ = cos^-1(-1/2) = π - π/3, π + π/3 = 2π/3, 4π/3
