exam Maths Puzzle Numerical Ability

a right angle is made up of three congruent angles. what are the measures of the angles.

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exam Other Question

Find values for m and b in the following system so that the solution to the system
is (-3,4).

5x+7y=b

mx+y=22
Determine the nature of the solutions of the equation.

y^2 = 3/2y + 2/7

Is there 1 real solution, 2 non-real solutions or 2 real solutions?

The fractions are throwing me o