exam Maths Puzzle Numerical Ability

I know this might not be the right type of problem but i guessed.

how many solutions does the system have? 2x-3y = 11
6x-9y = 33

a. 0
b. 1
c. 2
d. infinite

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exam Other Question

we are doing these types of questions in class. i am having a problem understanding how to solve.can you help?

the foci of the ellipse x^2/a^2+y^2/b^2=1b>a are_______

thanks for any insight into this.. A parrallelogram has sides 6 cm and 8 cm and a 65o angle. Find the lengths of the diagnols.