exam Maths Puzzle Numerical Ability

I need help with finding rational numbers not defined. Any tips would be appreciated.
Tammy Bolton

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exam Other Question

Please help me solve this I have posted it several times.

Use intercepts to graph each equation

a 2x+4=4

b 3x-6=y

Please help me with this
Thanks Janet invested $13,000, part at 13% and part at 6%. If the total interest at the end of the year is $1,200, how much did she invest at each rate?