Twelve less than the quotient of a number and 7 is -2

If the value of cos330°is√3/2 then find cos 165°.

Yvaries directly as x. y =90 when x=6. find y when x=13

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.