What is the answer to c to the third power, times c to the eighth power, times c to the negative fifth power?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry