exam Maths Puzzle Numerical Ability

Find two consecutive integers such that the sum of 2 times the frist integer and 7 times second integer is 88

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exam Other Question

Help me please!

Write the explicit for the sequence:

2,5,10,17,26

thank you
I do not understand these problems at all, could someone please help me?

The following equation represents an ellipse. True or False?
(x-3)^2/1 + (y+1)^2/25