Linear equations, relations and functions

Question 1 of 10

The rule for the mapping 1 → 3, 2 → 5, 3 → 7 is

Question 2 of 10

Find the inverse of f(x) = (3x − 2)/5.

Question 3 of 10

The sum of four consecutive even numbers is 36. What is the smallest?

Question 4 of 10

Solve 7 − 2x = 1.

Question 5 of 10

A function f is defined by f(x) = (x + 3)/(x − 2). Find the value of x for which f(x) = 2.

Question 6 of 10

For f(x) = 3x + 2, find x when f(x) = 17.

Question 7 of 10

Solve 5(y − 2) = 3y + 4.

Question 8 of 10

If f(x) = 4x − 3, find f(−2).

Question 9 of 10

If f(x) = 2x − 1 and g(x) = x² + 1, find g(f(2)).

Question 10 of 10

The cost C of hiring a bus is GH¢200 plus GH¢5 per km. How far can be travelled for GH¢450?