Find the complete factorization of the expression. 12xyz + 6xy − 10xz ] a) 2x(6zy + 3y − 5z) b) −2x(6zy + 3y + 5z) c) x(12zy + 6y − 10z) d) 2(6xzy + 3xy − 5xz)

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Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.