exam Maths Puzzle Numerical Ability

On March 5th, a couple took out a 90-day loan for $450 at 9% interest. On March 29th, they made a partial payment of $150. After making the payment, how much did they still owe?

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exam Other Question

1.) 4x2+4y2+4y=15

Please include
a) standard equation form
b) center
c) name of the major axis and length of major axis
d) name of the minor axis and length of minor axis The following matrix is obtained from the augmented matrix of a system of equations.

1 0 3 20
0 1 2 -2
0 0 1 4

What is the solution to the system is?