exam Maths Puzzle Numerical Ability

When do slove a radical equation using factoring or completing the square, what do you do when c=0?

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exam Other Question

find the measure of a complement angle with the given measure.

11*
THANKYOU FOR YOUR ANSWERS BUT I HAVE ANOTHER TWO.
1.13x 10^1 + 9.1 x 10^-1=

3/4 - 2/9 =