The Z-value for a 90 percent confidence is 1.645
To find the sample size use the formula:
Sample size = Z-value x SD / error)^2
Using the provided information:
SD = 4,000 miles
Error = 500 miles
Sample size = ((1.645) (4000)/ 500)^2 = 173.18 = 174
Answer: A, E, and F
explanation
Answer: For both 3x+1 and 7x-1 is There are no like terms.
I don’t know if you want me to solve because I did “Answer: There are no like terms.” or how you want it because the picture you show it confusing
Step-by-step explanation: Hope this help :D