If f(x) = 4x - 7 and f(c) = 9, find the value of c.

To find the value of c, we need to find the value of x in the following: 4x - 7 = 9.

Add seven to both sides: 4x = 16

Divide by 4: x = 4

AB

Related Maths GCSE answers

All answers ▸

Rewrite in the logarithmic form: T=2π√(L/G)


There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.


I don't understand how to solve quadratic inequalities?


What is the simplified expression of: 3a - a x 4a + 2a? And what rule do we use to carry out the simplification?