Step-by-step explanation:
sorry i couldn't solve the last and the last second one
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1165 divided by 255 = 5.17 = 5 costumes
Answer:
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Step-by-step explanation:
I took an educated guess, I remember doing this.
When you write that equation, you get 3x^2+6=81.
Solving for x:
Subtract by 6 on both sides of the equation to get 3x^2=75.
Then, divide by 3 on both sides of the equation to get x^2=25.
Finally, do the square root on both sides of the equation to get x=5.
The number is 5.