To find the average of three scores, add the three scores and divide the sum by 3. Let the score of the third test be x.
![\dfrac{94 + 88 + x}{3} \ge 90](https://tex.z-dn.net/?f=%20%5Cdfrac%7B94%20%2B%2088%20%2B%20x%7D%7B3%7D%20%5Cge%2090%20)
![\dfrac{x + 182}{3} \ge 90](https://tex.z-dn.net/?f=%20%5Cdfrac%7Bx%20%2B%20182%7D%7B3%7D%20%5Cge%2090%20)
![x + 182 \ge 270](https://tex.z-dn.net/?f=%20x%20%2B%20182%20%5Cge%20270%20)
![x \ge 88](https://tex.z-dn.net/?f=%20x%20%5Cge%2088%20)
Answer: The score must be at least 88.
It takes Allen 0.375 hours to run one mile. To run three miles, it would take him 1.125 hours, or 67.5 minutes.
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(x^2)+4x-12=48
I Hope this is what you were looking for. If it isn't this just plug it in
x=6
Answer:
![\fbox{8x+36}](https://tex.z-dn.net/?f=%5Cfbox%7B8x%2B36%7D)
Step-by-step explanation:
1. Use the distributive property to write the problem without parentheses. The distributive property says that you can multiply a number next to parentheses by all the numbers inside parentheses. The picture below explains.
![4(2x+9)=\\\\(4*2x)+(4*9)=\\\\4(2x+9)= 8x+36](https://tex.z-dn.net/?f=4%282x%2B9%29%3D%5C%5C%5C%5C%284%2A2x%29%2B%284%2A9%29%3D%5C%5C%5C%5C4%282x%2B9%29%3D%208x%2B36)
Therefore, your answer is
![\fbox{8x+36}](https://tex.z-dn.net/?f=%5Cfbox%7B8x%2B36%7D)