exam Maths Puzzle Numerical Ability

How would I Graph the line with equation?

y= -x

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exam Other Question

How do I solve using a system of two linear equations in two variables?

Barry is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old is each now? 9. A box contains four defective and six good electronic sensors. If five sensors are drawn, with replacement,
find the probability of drawing
(a) at most one defective
(b) at least one defective
(c) fewer than three defective