Mathsercise-C Ready? Substitution Here we go!

1 If a = 3 and b = 5, find the value of…. 2a + b 2x3 + 5 6 + 5 11 2ab Question 2 2x3 + 5 6 + 5 11 2ab 2x3x5 30 Answer 1 Substitution

2 When n = 8… evaluate the expression 3(2n-2) 3 (2x8 – 2) 3x14 42 Question 3 3 (2x8 – 2) Answer 3x14 42 2 Substitution

3 T = 3x + 4y Find the value of T when… x = -5 and y = 3 Question 4 Answer T = 3x-5 + 4x3 T = -15 + 12 T = -3 3 Substitution

4 Evaluate A = 3(2b – 4) when…. b = -2 and when.. A = 3 (2x-2 – 4) Start A = 3 x -8 A = -24 b = -5 A = 3 (2x-5 – 4) Answer A = 3 (-10 – 4) A = 3 x -14 A = -42 4 Substitution