Printable · GCSE Foundation · ages 14-16
Substitution into formulae worksheet — GCSE Foundation
Fifteen questions on "substitution into formulae" — DfE statement A2. Print it, or print three versions so neighbours cannot copy by letter; the key gives the letter for each version.
Substitution into formulae worksheet — GCSE Foundation
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- 1.Work out the value of 3a − 2b when a = 5 and b = 4
- 2.Work out the value of m² + 3m when m = −2
- 3.Work out the value of 5m² + 3m when m = −2.4
- 4.The formula for converting a temperature in Fahrenheit, F, to Celsius, C, is C = 5(F − 32) ÷ 9. Work out C, to 1 decimal place, when F = 98.6.
- 5.Work out the value of 3b − 4 when b = 6
- 6.Work out the value of 2x² when x = −3
- 7.A rectangle is x cm wide and twice as long as it is wide, so its area A cm² is given by A = 2x². Work out A when x = 3.
- 8.A person's body mass index is given by the formula B = m ÷ h², where m is the mass in kg and h is the height in metres. Work out B, to 1 decimal place, when m = 68 and h = 1.6.
- 9.Work out the value of 5y + 9 when y = 0
- 10.Work out the value of 2(x + 2) when x = −5
- 11.The braking distance of a car, in metres, is estimated using the formula d = 0.4v² + 6, where v is the speed in mph. A car travelling at 35 mph brakes. Work out the estimated braking distance.
- 12.Work out the value of 5a + 2 when a = 3
- 13.A formula is F = 4s. A pupil says that when s = 5 the value of F is 9, because they added 4 and 5 instead of multiplying. Work out the correct value of F when s = 5.
- 14.Work out the value of a² − 2b when a = −3 and b = 4.
- 15.The formula y = x² + 1 gives y in terms of x. Work out the value of y when x = −2.y = x² + 1
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