The answer is D. 27
54 divided by 2 is 27
Answer:
Step-by-step explanation:
2a-1<7-1.2 a
2a+1.2a<7+1
3.2 a<8
a<(8/3.2)
or a<(80/32)
or a<5/2
or a<2.5
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
The given equation is a quadratic which can be solved by quadratic formula or also completing the square.
we can easily complete the square here so using this concept on the given equation we get
![x^{2} -2x-62=0\\x^{2} -2x +1^{2} -1^2-62=0](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-2x-62%3D0%5C%5Cx%5E%7B2%7D%20-2x%20%2B1%5E%7B2%7D%20-1%5E2-62%3D0)
![(x-1)^{2} -63=0\\(x-1)^{2} =63](https://tex.z-dn.net/?f=%28x-1%29%5E%7B2%7D%20-63%3D0%5C%5C%28x-1%29%5E%7B2%7D%20%3D63)
Take square root on both sides of the equation which gives us
![x-1 =\sqrt{63}](https://tex.z-dn.net/?f=x-1%20%3D%5Csqrt%7B63%7D)
solution
x=1± sqrt{63}
x=1±3sqrt7
So option B is correct .
Answer:
La réponse devrait être 306
Step-by-step explanation: