Question

find which of the following statements are true.
1) the system of equation ×-2y=0 and 3×+4y=20 is consistent
2) quadratic equation a×2+b×+c=0 has no real roots, if b2-4ac=0

3) Distance between two points (×, ×) (y, y) is √2 |y-×| units

4) the probability of an event E is a number P(E) such that 0_< P(E) _<1
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Answer 1

dont know how yo do ot off ho what to dp