book Maths Puzzle Numerical Ability

A = 1/2h(B+b)

area of a trapezoid

solve for b

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book Other Question

Linear Systems


2x+3y-z=1
x-y-z=2
3x+2y-3z=3
Illustrate and explain the following operations using letters: B for black chips (+) and R for red chips (-).
(a) 8 + -3

(b) -2 + 4

(c) 3 + -5