750*7.9%*8=474 is the account at the end of 8 years. Good luck
Car B because 334 divided by 5= 41 mph
By either long or synthetic division, it's easy to show that

The quartic will be exactly divisible by

when the numerator of the remainder term vanishes, or for those values of

such that

I'm not sure how to count the number of solutions (software tells me it should be 80), but hopefully this is a helpful push in the right direction.
Answer:
The value of X is 6. X=6
Step-by-step explanation: