9514 1404 393
Answer:
B, D
Step-by-step explanation:
The quadratic expands to ...
(2n -1)² = (2n)² +2(2n)(-1) +(-1)² = 4n² -4n +1
The coefficients can be factored out of the sum, so ...
∑(4n²) = 4∑n² for example
The sum of 60 ones is 60:
So, the sum can be written as ...
_____
It appears that the key to choosing the correct answers is paying attention to signs.
Answer:
I believe the answer is 20 and 30
The answer is b because if you flip it across the y axis and translate it up seven then it lays on top of the other
Step-by-step explanation:
a. What is the total cost (startup fee and monthly charge) to use the cell phone plan for 1 month?
answer for a: <em>$95 + $55 = $150</em>
b. Is there a proportional relationship between time and the cost of the cell phone plan?
answer for b: <em>There is a proportional relationship between time and the cost of the cell phone plan because each month of time that passes, your phone will be charged $55. We know this because every month of Han's cell phone plan costs $55. </em>
c. What is the total cost for x months? (Write an equation for the situation.)
answer for c: <em>95 + 55x = y</em>
If you show that the example is showing a false statement then you are disproving the example/problem.
