Factor, if possible.u2 - 2uv - 63v2
A. (u - 7v)(u + 9v)
B. (u - v)(u + 9v)
C. (u + 7v)(u - 9v)
D. (u - 7v)(u + v)
Answer: C
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Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.If the speed of light is 3.00 ×108m/sec, how long does it take light to travel 2.29 × 1011 m, the distance from the sun to Mars? Round to one decimal place.
A. 7.6 × 102 min B. 76 sec C. 7.6 × 103 sec D. 7.6 × 102 sec
Add. Do not use a number line except as a check.-9.9 + 5.9
A. -4 B. -15.8 C. 4 D. 15.8
Find the integrating factor, the general solution, and the particular solution satisfying the initial condition. y' - 4y = -2e2t ; y(0) = -1
A. integrating factor: e4t
general solution: y = -2t + Ce4t
particular solution: y = -2t - e4t
B. integrating factor: e-4t
general solution: y = -e-2t + Ce4t
particular solution: y = -e-2t - 2e4t
C. integrating factor: e-4t
general solution: y = e2t + Ce4t
particular solution: y = e2t - 2e4t
D. integrating factor: e4t
general solution: y = 
e6t + Ce4t
particular solution: y = 
e6t - 
e4t
Provide an appropriate response.List all negative integer pairs that have a product of 12.
A. -1, -12 B. -2, -6; -3, -4 C. -3, -4 D. -1, -12; -2, -6; -3, -4