5:4 You just put a Colen In the middle EDIT*THERE WOULD ACTUALLY BE A INFINITE AMOUNT OF ANSWER FOR EXAMPLE IT COULD BE 10:8 BECAUSE YOU MULTIPLY BY 2 SO EVERY TIME U DO DAT U HAVE MANY ANSWERS.
He made 896.05 because you subtract 1803.95 from 2700 to get your answer.
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Formula
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Area of circle = πr²
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Find radius
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πr² = 75
r² = 75 ÷ π
r² = 23.87
r = √23.87
r = 4.89 cm (nearest hundreds)
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Answer : radius = 4.89cm
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Answer:
- adult tickets: $13
- student tickets $7
Step-by-step explanation:
The given equations are ...
4a +5s = 87
2a +2s = 40
We observe that the coefficient of 'a' in the first equation is 2 times that in the second equation. We can multiply the second equation by -2 and add it to the first to eliminate 'a' terms.
(4a +5s) -2(2a +2s) = (87) -2(40)
4a +5s -4a -4s = 87 -80 . . . . . . . . . eliminate parentheses
s = 7 . . . . . . . . . . . . . . . . . .simplify
2a +2(7) = 40 . . . substitute for s in the second equation
2a = 26 . . . . . . subtract 14
a = 13 . . . . . . . divide by 2
Adult tickets cost $13; student tickets cost $7.
Answer:
![f^{-1}(x)=4(x+5)](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3D4%28x%2B5%29)
Step-by-step explanation:
So we have the function:
![f(x)=\frac{x}{4}-5](https://tex.z-dn.net/?f=f%28x%29%3D%5Cfrac%7Bx%7D%7B4%7D-5)
To find the inverse of a function, switch f(x) and x, change f(x) to f⁻¹(x), and solve for it. Thus:
![x=\frac{f^{-1}(x)}{4}-5](https://tex.z-dn.net/?f=x%3D%5Cfrac%7Bf%5E%7B-1%7D%28x%29%7D%7B4%7D-5)
Add 5 to both sides:
![x+5=\frac{f^{-1}(x)}{4}](https://tex.z-dn.net/?f=x%2B5%3D%5Cfrac%7Bf%5E%7B-1%7D%28x%29%7D%7B4%7D)
Multiply both sides by 4:
![f^{-1}(x)=4(x+5)](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3D4%28x%2B5%29)
And we're done!
Hope this helps!