exam Maths Puzzle Numerical Ability

if f(x)=4x-3 find the following:
f(-1)

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exam Other Question

The ratio of foxes to rabbits is 2 to 9. If there are 35 fewer foxes than rabbits, how many of each are there.

Need answer in algebra. Tx! The base of a ladder is 14 feet away from the wall. The top of the ladder is 17 feet from the floor. Find the length of the ladder to the nearest thousandth.