Solve the linear equation.- 
r + 2r = 
r + 
A. {0}
B. 
C. 
D. {9}
Answer: D
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Find the equation of the tangent plane to the given surface at the indicated point.z = 
+ 
; (3, 3, 4)
A. 
x - 
y - z = - 1
B. 
x + 
y - z = - 1
C. 
x + 
y - z = - 1
D. 
x + 
y - z = 1
Multiply or find the special product.
?
?
A. 
B. 
C. 
D. 
E. 
Solve the problem.On our moon, the acceleration of gravity is -1.6 m/sec2. If a rock is dropped into a crevasse, how fast will it be going just before it hits bottom 45 seconds later?
A. -36 m/sec B. 3240 m/sec C. 72 m/sec D. -72 m/sec
Solve the SSA triangle. Indicate whether the given measurements result in no triangle, one triangle, or two triangles. Solve the resulting triangle. Round the answer to the nearest tenth.C = 35°, a = 18.7, c = 16.1
A. No triangle exists. B. Solution 1: A = 103°, B = 42°, b = 27.4 Solution 2: A = 7°, B = 138°, b = 3.4 C. Solution 1: A = 42°, B = 103°, b = 27.4 Solution 2: A = 138°, B = 7°, b = 3.4 D. A = 42°, B = 103°, b = 27.4