Solve: 3x = 9 help me please

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Percent increase and decrease. original number: 45 new number: 18