1) Write 155,000 in standard form a) 15.5 x 10 4 b) 1.55 x 10 5 c) 1.55 x 10 3 d) 0.155 x 10 6 2) find x: 5 x x 5 -2 = 5 3 a) 1 b) 5 c) -1 d) 2 3) Work out the value of expression ab + cd when a = −2, b = 3, c = −4 and d = 6. a) -30 b) 18 c) -18 d) 30 4) . a) B b) C c) D d) A 5) Slove these equations:3x + 7 = 22 a) x=29/3 b) x=7 c) x=63 d) x=5 6) Work out the lettered angles in these diagrams. a) 81 b) 32 c) 122 d) 92

Math 8

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