Answer: The total amount the water change was -28 gallons by the end of the week <u>OR</u> The total amount the water changed decreased 28 gallons by the end of the week. Depending on how you want to word it.
Hope this helps!
Step-by-step explanation:
<u>Create you equation:</u>
x = the total amount the water changed
d = the amount of days
x = -4d
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<u>Insert the known information into the equation and solve:</u>
x = -4d
x = -4(7)
x = -28
364.5 because 9 to the third power is 729. 729 divided by 2 is 364.5
Let the number be x
3x + 5 = 20
3x = 20 - 5
x = 15/3
x=5
Answer:
hope its help brain least me
