2. ebony’s bank balance first reached $400 on day 4. the last day her balance was $400 was day 8.
(a) determine . explain how you determined these amounts.
(b) estimate . explain how you determined these amounts.
(c) jade said that the amount of money ebony took out of her account each day between day 8 and day 12 was the same amount of money she put into her account each day between day 0 and day 4. recall that day 12 is when the balance first reached $0. without doing any calculations, how could you show jade why that cannot be true?

Step-by-step explanation:

a) On day 4, her balance = $400

on day 5, her balance = $0

on day 6, her balance = $400

on day 7, her balance = $0

on day 8, her balance = $400

From the above illustration, Ebony withdraws all the money and deposits the same amount, each every other days.

c)  I do not think so, perhaps, she must have been doing that previously, between day 4 and day 8, but have changed her way of withdrawals and savings between day 8 and day 12.

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10