Evaluate the expression below when x = 12.5 and y = 6
12x - 3y^2?
1 answer:
The answer is 42, 12(12.5) - 3(6) ^2 / which is 36 so it’s 12(12.5) - 36 so simplistically it’s 150-36 and that’s 42
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The quadratic formula:
![ax^2+bx+c=0\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=ax%5E2%2Bbx%2Bc%3D0%5C%5C%5C%5Cx_1%3D%5Cdfrac%7B-b-%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D%3B%5C%20x_2%3D%5Cdfrac%7B-b%2B%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
We have:
![5x^2+12x-2=0\\\\a=5;\ b=12;\ c=-2\\\\b^2-4ac=12^2-4\cdot5\cdot(-2)=144+40=184\\\\\sqrt{b^2-4ac}=\sqrt{184}=\sqrt{4\cdot46}=2\sqrt{46}](https://tex.z-dn.net/?f=5x%5E2%2B12x-2%3D0%5C%5C%5C%5Ca%3D5%3B%5C%20b%3D12%3B%5C%20c%3D-2%5C%5C%5C%5Cb%5E2-4ac%3D12%5E2-4%5Ccdot5%5Ccdot%28-2%29%3D144%2B40%3D184%5C%5C%5C%5C%5Csqrt%7Bb%5E2-4ac%7D%3D%5Csqrt%7B184%7D%3D%5Csqrt%7B4%5Ccdot46%7D%3D2%5Csqrt%7B46%7D)
substitute
Answer:
noway 09
Step-by-step explanation:
Answer:
104
Step-by-step explanation:
260x.4=104
The answer is d
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x>-11+7
x>-4