exam Maths Puzzle Numerical Ability

Use FOIL to multiply
(6x � 1)(3x � 4)

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exam Other Question

a girl is 2/3 older than her sister. In 6 years, she will be 4/5 older and in 15 years it will be 7/8. Both girls are under 10 years old. what are their ages? Can you help me with this problem: f(x)= 7x-40 and h(x)= -x squared plus 6x

f(h(x))=