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boyakko [2]
3 years ago
8

Which of the quadratics has a graph with only one x-intercept? A) y = 2x2 + 4 B) y = x2 - 8x + 16 C) y = 2x2 - 8x + 20 D) y = -2

(x -1)2 + 2
Mathematics
2 answers:
8_murik_8 [283]3 years ago
7 0
I think its D but I'm assuming that the 2 to the right of the bracket was mistake. every quadratic equation (x^2) has two roots (2 x intercepts) so find the equation without an x^2
xeze [42]3 years ago
5 0
There is a math app called desmos past the graph equations and it will show you the answer. But i will comment below and tell you the answer if you don't want to

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\text{When x=0, }f(x)=\dfrac{280}{0}=$Undetermined\\\text{When x=1, }f(x)=\dfrac{280}{1}=$280 days\\\text{When x=280, }f(x)=\dfrac{280}{280}=$1 day\\\text{When x=560, }f(x)=\dfrac{280}{560}=$0.5 days

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In this case, the independent variable is x, the number of full-time workers. We have shown that x cannot be zero as there must be at least a worker on ground.

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