exam Maths Puzzle Numerical Ability

Determine the real roots of the equation 4t^2 - 20t + 25 =0
Circle one No real roots, One real root, or two real roots.

Solve the following equation v/4x + 1=11

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exam Other Question

Find the standard matrix for the linear transformation T from R2 to R2 that first reflects points through the horizontal x1 axis and then reflects points through the line x2=x1 well this is actually from algebra 2.
3 The characteristic of log 6198 is _______
2
4
3
1

i really really have no idea how to do this problem... please help!