Using the arithmetic sequence: -2,1,4,7
what is the 21st term?
find f(21)=

Easy points boii. read it. ya. fresh

Which best explains why this triangle is or is not a right triangle?

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?