If the area of triangle dkg is 156 square centimeters. and the lengths of the sides are: d= x+20, k=4x, and G= 30 degrees. solve for x I need this urgently please!!

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Find the value of x. give reasons to justify your solutions! c ∈ ae