exam Maths Puzzle Numerical Ability

Solve each open sentence. Then graph the solution set. Add the Cases 1 and 2.

|y-9|<19

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exam Other Question

Suppose the sets A and B are bases for a subspace W in R^n. Prove that neither set can contain more elements than the other.

Here is what I have figured out so far and I need h solve for exact form, 3(5^x)=6^x-1