Answer:
A
Step-by-step explanation:
A point estimate is the sample value which is used to estimate the population parameter
Sample characteristics for population mean is sample mean, which is 16.5
Given :
AT&T charges $350 to get a plan with them, plus $60 per month.
T-Mobile charges a $275 initial fee, plus $80 per month.
To Find :
Write an equation or inequality that can be used to determine the number of months it would take for T-Mobile to cost the same or more than AT&T.
Solution :
Money-time relation of plan AT&T :

Money-time relation of plan T-Mobile :

( Here, x and y are number of months )
Let, after t months would take for T-Mobile to cost the same or more than AT&T.
So, 

Hence, this is the required solution.
Answer: One solution.
Step-by-step explanation:
2(2x-3)+5x=4x+8x
4x-6+5x=12x
9x-6=12x
-6=3x
x=-2
Answer:
answer is here
Step-by-step explanation:
https://www.mathpapa.com/algebra-calculator.html
(2x + 1)^2 - 2(2x^2 - 1) = 4x^2 + 4x + 1 - 4x^2 + 2 = 4x + 3