exam Maths Puzzle Numerical Ability

Find:
sin A if cos A = -(3/5) and 90 degrees < A < 180 degrees

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exam Other Question

Which of the following applies to the graph of 3x - y = 9?
The choices are:
m = -3, passes through (9, 0)
m = 3, y-intercept = -9
m = -3, x-intercept = -9
m = 1/3, passes through (0,-9) Express 0.01 as a fraction. plesae show all your work