exam Maths Puzzle Numerical Ability

Factor 50x^3-90x^2

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exam Other Question

In the design of a bridge, an engineer determines that four fewer 18-m girders are needed for the span length than 15-m girders. How many 18-m girders are needed? Which of the following defines what a conic section is?

(a) A curve made by intersecting a cone with a plane.
(b) A curve made by all the points a fixed distance from a certain