exam
Maths Puzzle
Numerical Ability
Use the Substitution method to solve the system of equations. Give your answer as an ordered pair (x,y).
x + y = -5
x - y = 3
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exam Other Question
n-4(1+5)=-2
n-4-20n=-2
4+21n=-2(+4)
21n=2
n=10.5
A quadratic function has no x-intercepts. What is a possible value of the diacriminant of the function? I think it is -2??