An alloy is made of copper and iron by weight. 42% of it is copper and the rest is iron. If the alloy weights 55 kg, find the we
2 answers:
You might be interested in
ANSWER
{}
EXPLANATION
From the graph, the given quadratic inequality is
We can see that the corresponding quadratic function is a perfect square.
Since the graph opens upwards and it is always above the x-axis, any real number you plug into the inequality, the result is greater than or equal to zero.
Hence the solution set is
{}
The correct answer is A