exam Maths Puzzle Numerical Ability

Please help me find the solution to the following problem:

(12+-15)2

The 2 is the exponent

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exam Other Question

Samuel invested a portion of $15,000 in a savings account paying 5 percent annual interest and the reaminder in a time deposit paying 7 percent. If his annual interest from the ti Write a mathematical argument that two lines perpendicular to the same line are parallel to each other.