exam Maths Puzzle Numerical Ability

question on surds

square route 5 (X)times square route 10

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solve the following for x

15x - 9 = 3x + 21

2x
_ = 6

5

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exam Other Question

please help.find the length and width of rectangle ABCD . Toop left A top right D bottom left B bottom right C .between B and C is P=140 cm. between D and C is x.Thanks for helpin Find the x-intercepts. Express your answer as an ordered pair
y = x^2 - 7x - 10