exam Maths Puzzle Numerical Ability

Stephanie invests $2000 into a GIC which will double every five years, wheras Don invests $1000 into a GIC which will triple every three years. How many years will pass before they

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exam Other Question

**Solve each equation by factoring:

1) {{{ 3x^2 -2x=8 }}}

2) {{{ 2x (x-3)= 5x^2-7x}}}

** Solve each equation by the square root property:

1) {{{ (3x - 4)^2 = 8 }}} Evaluate
|-x-2y| x= -2 y= 3

I say the answer is 4 but my daughter says -4.
Which one is right???

Thanks for your expertise!!!!