Formulae 2

Intermediate 1 Homework Unit 1

Formulae 2 1) The cost of joining a musical society is the membership fee plus the cost of hiring the musical score. How much will it cost in a year that the membership fee is £20 and the hire of the musical score costs £9? 2) The cost of hiring a car is £38 per day plus 4p per mile. How much does it cost to hire this car for 5 days driving a total of 800 miles? 3) To change degrees centigrade (°C) to (°F), subtract 32, divide the

answer by 9 and then multiply by 5. Change 77°F to °C. 4) C = πd

5) a = p - q 6) V = Ah

Evaluate C when d = 18 Evaluate a when p = 35 and q = 12 Evaluate V when A = 45 and h = 12

7) y = ax + b

Evaluate y when a = 3, b = 2 and x = 4

8) P = q + rt

Evaluate P when q = 4, r = 2 and t = 5

9) a = v - u t

Evaluate a when v = 12, u = 4 and t = 2

10)A = 3b – 2c

Evaluate A when b = 5 and c = 3