exam Maths Puzzle Numerical Ability

rewrite the expresion so that all exponents are positive

(-13)^-1

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exam Other Question

What number exceeds 23 by 4 more than twice the amount by which 15 exceeds -3? Find the slope and y-intercept.
x = -7
(A) Slope: undefined; y-intercept: (0, -7)
(B) Slope: 0; y-intercept: none
(C) Slope: undefined; y-intercept: none
(D) Slope: 0; y-in