Estimate the sum or difference by first rounding to the nearest ten.69167527
A. 270
B. 260
C. 300
D. 259
Answer: A
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Solve.The pitch of a screw is the distance between threads. With each complete rotation of the screw, it goes in or out a distance equal to its pitch. How far will a screw with a pitch of 
in. go into a piece of wood when it is turned 10 complete rotations clockwise?
A. 
in.
B. 
in.
C. 
in.
D. 
in.
Rotate the axes so that the new equation contains no xy-term. Graph the new equation.x2 + xy + y2 - 3y - 6 = 0
A. 
B. 
Decide whether the argument is valid or invalid, and give the form (of valid or invalid argument) that applies.If it's Tuesday, then this must be Paris.
This must not be Paris.
A. Invalid; fallacy of the inverse B. Invalid; fallacy of the converse C. Valid; reasoning by transitivity D. Valid; modus tollens
Multiply and simplify.
? 3b
A. 
b
B. 
C. 
D. 11b