Use a graphing calculator to sketch the graph of the quadratic equation and then give the coordinates for the x-intercepts (if t
hey exist) y=x2+7x+10 A (-2,0),(5,0) B (2,0);(-5,0) C (2,0);(5,0) D (-2,0);(-5,0)
1 answer:
Answer:
Option D.
Step-by-step explanation:
The given quadratic equation is
We need to draw the graph of given equation by using graphing calculator as shown below.
From the graph it is clear that the parabola intersect the x-axis at points (-2,0) and (-5,0). So, the x-intercepts are (-2,0) and (-5,0).
Therefore, the correct option is D.
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Answer:
The sample size 'n' = 72,030
Step-by-step explanation:
<u>Step(i):-</u>
<em>Given that the Estimate Error = 0.013</em>
<em>Given that the standard deviation of the Population = 1.5</em>
<em>The estimated error is determined by </em>
<em /><em />
<u><em>Step(ii):-</em></u>
<em>Given that the Level of significance = 0.98 or 0.02</em>
<em>Z₀.₀₂ = 2.326</em>
<em>The estimated error is determined by </em>
<em> </em><em />
<em> </em><em />
<em> </em><em />
<u><em>Squaring on both sides, we get</em></u>
<em> n = 72,030</em>
<u><em>Final answer:-</em></u>
The sample size 'n' = 72,030