Double my tens digit to get my one digit. double me and i am less then 50

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1