Which of the following statements is not always true? a. in a rhombus, both pairs of opposite sides are parallel. b. in a rhombus, the diagonals bisect each other. c. in a rhombus, all four angles are congruent. d. in a rhombus, both pairs of opposite sides are congruent

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Answer this 30 points and brainliest!

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?