exam Maths Puzzle Numerical Ability

find the slope and the intercepts of each line.

f(x) = 4/5x + 7...............4/5 is 4 over 5.

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exam Other Question

Is --x^2 = x an identity (true for all values of x)? Insert grouping symbols (parenthesis) so that the expression evaluates to the given number:

24/3*2+2*5; evaluate to 15