<h3>
Answer: 78.6</h3>
Work Shown:
![\begin{array}{|c|c|} \cline{1-2}\text{Number of People} & \text{Score}\\\cline{1-2}9 & 90\\\cline{1-2}18 & 80\\\cline{1-2}15 & 70\\\cline{1-2}\end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7B%7Cc%7Cc%7C%7D%20%5Ccline%7B1-2%7D%5Ctext%7BNumber%20of%20People%7D%20%26%20%5Ctext%7BScore%7D%5C%5C%5Ccline%7B1-2%7D9%20%26%2090%5C%5C%5Ccline%7B1-2%7D18%20%26%2080%5C%5C%5Ccline%7B1-2%7D15%20%26%2070%5C%5C%5Ccline%7B1-2%7D%5Cend%7Barray%7D)
Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.
![\begin{array}{|c|c|c|} \cline{1-3}\text{Number of People} & \text{Score} & \text{Number*Score}\\\cline{1-3}9 & 90 & 810\\\cline{1-3}18 & 80 & 1440\\\cline{1-3}15 & 70 & 1050\\\cline{1-3}\end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7B%7Cc%7Cc%7Cc%7C%7D%20%5Ccline%7B1-3%7D%5Ctext%7BNumber%20of%20People%7D%20%26%20%5Ctext%7BScore%7D%20%26%20%5Ctext%7BNumber%2AScore%7D%5C%5C%5Ccline%7B1-3%7D9%20%26%2090%20%26%20810%5C%5C%5Ccline%7B1-3%7D18%20%26%2080%20%26%201440%5C%5C%5Ccline%7B1-3%7D15%20%26%2070%20%26%201050%5C%5C%5Ccline%7B1-3%7D%5Cend%7Barray%7D)
The values in the third column add to 810+1440+1050 = 3300
Divide this over the total number of people which is 9+18+15 = 42
The mean is 3300/42 =78.571 approximately which rounds to 78.6
1).2:5
2). If pan has 40 dollars in her account that means her brother has 100 dollars since all your doing is 20×2=40 20×5=100
3). Im not sure about this one but I assume it is 4:10
(I dont know what a tape diagram is but I hope this helped).
Answer:
5600 × 7 = 32, 000 You should multiply
Answer:
![y = (x-2)^{2} -4](https://tex.z-dn.net/?f=y%20%3D%20%28x-2%29%5E%7B2%7D%20-4)
Step-by-step explanation:
To complete the square: add 4 to both sides because the product of 4 as 2 as the factor which 2 * 2 so ![2^{2}](https://tex.z-dn.net/?f=2%5E%7B2%7D)
![y + ? = x^{2} - 4x + ?](https://tex.z-dn.net/?f=y%20%2B%20%20%3F%20%3D%20x%5E%7B2%7D%20-%204x%20%2B%20%3F)
![y + 2^{2} = x^{2} - 4x + 2^{2}](https://tex.z-dn.net/?f=y%20%2B%20%202%5E%7B2%7D%20%3D%20x%5E%7B2%7D%20-%204x%20%2B%202%5E%7B2%7D)
![y + 4 = x^{2} - 4x + 4](https://tex.z-dn.net/?f=y%20%2B%204%20%3D%20x%5E%7B2%7D%20-%204x%20%2B%204)
Now we can factor the expression
![y + 4 = (x-2)^{2}](https://tex.z-dn.net/?f=y%20%2B%204%20%3D%20%28x-2%29%5E%7B2%7D)
Move the 4 to the other side to isolate y which changes the sign
Doming ran a total of 4 miles not 4.75. This is because if we take away the 6 minutes of walking, it will be 32 minutes left of just running, and if he is going exactly 8 minutes per mile then he ran 4 miles in total.