Weegy: A. 4x+7x=11x; 11x+(-x) = 11x-1x=10x; B. -5yz+yz=-4yz; -4yz+2yz=-2yz.
User: Simplify these expressions.
a. 13xyz + 9 + 2xyz + 3
b. 6ab + (–2ab) + 4 + 6
Weegy: a. 13xyz + 9 + 2xyz + 3;
13xyz+2xyz+ 9+3 ( combine like terms);
15xyz+12.
b. 6ab + ( 2ab) + 4 + 6;
6ab-2ab+4+6;
4ab+10.
User: Write the shortened form of each monomial.
a. 3 · b
b. n · m
c. 8 · s · t
d. 2 · q · r · s
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