Geometric mean of 1 and 25

1 answer:

8 0

The geometric mean is the square root of the 2 numbers multiplied together.
1*25=25
The square root of 25 is 5.
The geometric mean is 5.

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If -1/2x+5=1 find the value of 8x

Kipish [7]

Answer:

$\huge\boxed{8x=64}$

Step-by-step explanation:

$-\dfrac{1}{2}x+5=1\qquad|\text{subtract 5 from both sides}\\\\-\dfrac{1}{2}x+5-5=1-5\\\\-\dfrac{1}{2}x=-4\qquad|\text{multiply both sides by (-2)}\\\\(-2\!\!\!\!\diagup)\cdot\left(-\dfrac{1}{2\!\!\!\!\diagup}x\right)=(-2)(-4)\\\\x=8\qquad|\text{multiply both sides by 8}\\\\8\cdot x=8\cdot 8\\\\8x=64$