11(7+4)=__•7+11•__
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The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Taina went to the toy store and spent $21.05 on a board game, $2.75 on coloring books, and $13.22 on a model airplane. about how much money did taina spend in the toy store?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.