book Maths Puzzle Numerical Ability



Find the domain of

y = 5x2 – 14x – 10







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Emily received $1,240 from selling her car. She inversted part of the money at 8% and the rest at 7%. Her overall return was 7.59%. How much did Emily invest in thew account which I have a question concerning using quadratic equations to solve word problems.
Here is the question;
Find two positive numbers in the ratio 2:3 whose product is 2400.
I need to