exam Maths Puzzle Numerical Ability

Evaluate: b to the power of 2 minus 2bc + c to the power of 2

if b = 4 and c = -1

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exam Other Question

Solve by graphing. Indicate whether each system is independent, inconsistent, or dependent.

3x - y = 4
3x - y = 0 Find the slope intercept of the line that has the given characteristics.
Slope 3.7 and y-intercept (0, -4)

the slope-intercept equation y=?
Can someone Help please.