exam
Maths Puzzle
Numerical Ability
In how many ways can 7 different colors be arranged in a row if the first is always red, the last is always blue and the middle one is always green?
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exam Other Question
How do I write a formula to evaluate the polynomial at the points x = -2 and y= -3 for the following 1-x^2y+6xy^2-x^3y^3+12y^5
Your help is greatly appreciated!!
how many liters of a 10% acid solution must be mixed with a 50% acid solution in order to obtain 20 liters of a 30% solution?