Answer and explanation:
Eric's expression is and Andrea's is .
In Eric's expression, 10 represents the amount of substance he begins with. 1/2 is the amount of substance left after each time period (in this case, each week).
Andrea's expression can be written as . The one outside of parentheses represents the initial amount of the substance. The one inside of parentheses represents 100% of the original amount of the substance. 0.2 represents the 20% of the substance that is lost each time period. The variable w in this case represents the number of weeks.
The answer to the problem is 7 and here's why:
To answer this problem, it’s best to work backwards (start at the end and work towards the beginning). If we know that something plus 17 equals 22, then we can represent this as x + 17 = 22. Solving the equation algebraically, we find that x = 5 (this is done by isolating x on one side of the equation, so by subtracting the 22 by 17, which equals 5).
We then know that something divided by 3 equals 5, so we can represent this as x / 3 = 5. Solving the equation algebraically, we find that x = 15 (this is done by isolating x on one side of the equation, so by multiplying the 5 by 3, which equals 15).
We then know that something subtracted by 13 equals 15, so we can represent this as x - 13 = 15. Solving the equation algebraically, we find that x = 28 (this is done by isolating x on one side of the equation, so by adding the 13 to the 15, which equals 28).
Finally, we know that something multiplied by 4 equals 28, so we can represent this as x times 4 = 28. Solving the equation algebraically, we find that x = 7 (this is done by isolating x on one side of the equation, so by dividing the 28 by 4, which equals 7), so 7 is your answer.
24x? i haven’t done these in a while so lmk if i’m wrong
Answer: C.275
Step-by-step explanation:
A symmeterical distribution forms when the values of attributes occur on regular frequencies and the mean, median and mode positioned on the same point on the graph.
We know that
Mean = Median = Mode
It is also known as a Normal distribution.
Given : The mean of a symmetrical distribution is 275.
Then , the median and mode of symmetrical distribution would be the same as 275.
Thus , the value could be the median of the distribution = 275
Hence, the correct answer is C.275.