If x-1/x=4, find the value of x⁴+1/x⁴​

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?