book Maths Puzzle Numerical Ability

Please help again. I have no understanding of this at all. Thanks for all help.

3) The formula for calculating the amount of money returned for deposit money into a bank accou

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book Other Question

Solve each linear system by substitution.

a) x+2y=6
4x+3y=4

b) x+5y=11
4x-y=2

c) x-7=y
1
- x-1=y
4 Okay I need major help on this question. I need to apply the quadratic formula to this equation bx^2-cx+a^2=0 my problem is i don't know how to apply the formula with two square ro