Add or subtract.
+ 
A. 
B. 
C. 
D. 4
Answer: B
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Without graphing the function, determine its amplitude or period as requested.y = -2 cos xFind the period.
A. ?
B. 2
C. 
D. 2?
Solve the problem.The number of households in Country X with personal computers (PCs) and the total number of households in Country X are shown in the table below for various years. Households with Personal Computers (Millions)YearHouseholds with PCs Total Households200528.2195.5200930.4598.0201149.80100.5201559.82102.2201767.42114.0Let C(t) be the number (in millions) of households in Country X with PCs and H(t) be the total number (in millions) of households in Country X, both at t years since 2002. (i) Find equations for C(t) and H(t) to model the data.(ii) Use substitution or elimination to predict when all households in Country X will have PCs.(iii) Use the models to predict the percentage of households that will have PCs in 2032.
A. (i) C(t) = 3.67t + 9.63; H(t) = 4.30t + 52.37; (ii) In about 2031, all households in Country X will have PCs. (iii) In 2032, about 79.0% of households will have PCs. B. (i) C(t) = 3.50t + 14.22; H(t) = 1.31t + 89.70; (ii) In about 2036, all households in Country X will have PCs. (iii) In 2032, about 82.4% of households will have PCs. C. (i) C(t) = 5.53t + 12.86; H(t) = 2.53t + 79.41; (ii) In about 2042, all households in Country X will have PCs. (iii) In 2032, about 85.7% of households will have PCs. D. (i) C(t) = 4.81t + 16.01; H(t) = 0.99t + 68.42; (ii) In about 2041, all households in Country X will have PCs. (iii) In 2032, about 77.2% of households will have PCs.
Solve.Subtract: (9x2 - 14x - 12) - (4x2 + 17x + 8)
A. 5x2 - 10x - 4 B. 5x2 - 31x - 4 C. 5x2 - 31x - 20 D. -46x7
Express the given trigonometric function in terms of the indicated function.sin ? in terms of csc ?
A. 
B. 
C. ±
D. 