Simplify by combining like terms.- 
+ 6y + 
y - 14 + 
y
A. 
+ 7
B. 
y - 7
C. 
y - 
D. 
y
Answer: C
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Solve the problem.Find the center of mass of a tetrahedron of density 
bounded by the coordinate planes and the plane 
.
A. 
= 
, 
= 
, 
= 
B. 
= 
, 
= 
, 
= 
C. 
= 
, 
= 
, 
= 
D. 
= 
, 
= 
, 
= 
Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
A. 4 cm B. 9.567 cm C. 7.483 cm D. 7 cm
Determine whether the statement is true or false."The easiest classes are Algebra or History" is an example of how union can be applied to a real-life situation.
A. True B. False
Solve.To determine the number of fish in a lake, a park ranger catches 300 fish, tags them, and returns them to the lake. Later, 72 fish are caught, and it is found that 24 of them are tagged. Estimate the number of fish in the lake.
A. 900 B. 518,400 C. 100 D. 6