Express the given quantity in terms of sin x or cos x.cos (6? + x)
A. -cos x
B. cos x - sin x
C. cos x
D. -sin x
Answer: C
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Divide. Write with positive exponents.
A. 3x3 + 12x10 - 12x8 + 8x6 + 5x5
B. 3x3 + 3x2 - 3 + 
+ 
C. 3x3 + 3x2 - 3
D. 12x11 + 3x2 - 3 + 
+ 
Solve.
+ 7 = 0
A. - 7 B. 2401 C. No solution D. - 2401
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 of C and H.(ii) Estimate when fewer than 40% of households in Country X had PCs.
A. (i) C(t) = 3.67t + 9.63; H(t) = 4.30t + 52.37; (ii) Before 2005, fewer than 40% of households in Country X had PCs. B. (i) C(t) = 5.53t + 12.86; H(t) = 2.53t + 79.41; (ii) Before 2012, fewer than 40% of households in Country X had PCs. C. (i) C(t) = 4.81t + 16.01; H(t) = 0.99t + 68.42; (ii) Before 2014, fewer than 40% of households in Country X had PCs. D. (i) C(t) = 3.50t + 14.22; H(t) = 1.31t + 89.70; (ii) Before 2009, fewer than 40% of households in Country X had PCs.
Find the x-intercept(s) and the y-intercept of the function.f(x) = -2
A. no x-intercept, no y-intercept B. no x-intercept, (0, -2) C. (-2, 0), (0, -2) D. (-2, 0), no y-intercept