Add.
+ 
A. 
B. - 
C. - 
D. - 
Answer: C
Mathematics
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Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.2x - 8y + 9z = -5 and -6x - 9y + 3z = 4
A. 1.549 rad B. 0.883 rad C. 0.627 rad D. 0.688 rad
Mathematics
Multiply.(5)(-7)
A. -35 B. -70 C. -25 D. 35
Mathematics
Evaluate the function.If r(x) = 
, find r(-5).
A. 0
B. 
C. 5
D. - 
Mathematics
Solve the problem.The surface area of a sphere with radius r is 4? r2. Write a polynomial that gives the surface area of a sphere with radius 
A. 4?(49r2 + 14r + 49) B. 4?(r2 + 49) C. 4?(r2 + 14r + 49) D. 4?(r + 49)
Mathematics