exam Maths Puzzle Numerical Ability

Solve the system by addition. -4x - 7y = -1, x - 3y = 5

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Calculate the simple interest rate. P=$4,000, I=$190, t= 6 months For an ellipse with foci (0,+or-1) and a major axis with length 6.
a) Explain in 1-2 sentences how you decide if this ellipse is horizontal or vertical.
b) In 3-4 sentences, e