Solve the system.   +  -  =    -  + 

/> = - -  +  -  = 



A.
B. {(-2, 1, 7)}
C. {(-2, 1, -7)}
D.

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Answer: C

Mathematics

Perform the desired operation. Write the answer in the form a + bi.8i(8 - 5i)

A. 64i- 40 B. 64i + 40i2 C. 64i - 40i2 D. 40+ 64i

Parametric equations and a parameter interval for the motion of a particle in the xy-plane are given. Identify the particle's path by finding a Cartesian equation for it. Graph the Cartesian equation. Indicate the portion of the graph traced by the particle and the direction of motion.x = 4 cos t, y = 4 sin t, ? ? t ? 2?

A. x² + y² = 1

Clockwise from (1, 0) to (1, 0), one rotation
B. x² + y² = 16

Counterclockwise from (-4, 0) to (4, 0)
C. x² + y² = 16

Clockwise from (4, 0) to (-4, 0)
D. x² + y² = 16

Counterclockwise from (4, 0) to (4, 0), one rotation

Solve the problem.A projectile is thrown upward so that its distance above the ground after t sec is given by  After how many seconds does it reach its maximum height?

A. 34 sec B. 25.5 sec C. 17 sec D. 8 sec

Solve the problem.Two LORAN stations are positioned 278 miles apart along a straight shore. A ship records a time difference of 0.00086 seconds between the LORAN signals. (The radio signals travel at 186,000 miles per second.) Where will the ship reach shore if it were to follow the hyperbola corresponding to this time difference? If the ship is 200 miles offshore, what is the position of the ship?

A. 59 miles from the master station, (161.9, 200) B. 80 miles from the master station, (161.9, 200) C. 80 miles from the master station, (200, 161.9) D. 59 miles from the master station, (200, 161.9)