exam Maths Puzzle Numerical Ability

Please help, I am stuck again.....

Use a coefficient of friction of 0.4 in the formula from example 6 and find the speeds of cars that left skid marks oflenghts 150 feet, 200 fe

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exam Other Question

If x represents the first of two consecutive odd integers, express the sum of the two integers in terms of x.

Do you always have to combine like terms in order for the anwser to if a single roll of wallpaper will cover 3 square meters, how many single rolls will it take to cover a will 2 meters x 5 meters?