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# Bernardo F.

## Mathematics and Computer Programming Tutor

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## Bernardo's Resources

For this question it's useful to define the unknown. Let's call x the number of liters of 12% acid solution to be used. Since we're going to mix the solutions, our new solution will have (x+5) liters.  How much acid is present in the new solution? Well, the original 5 liters contribute...

Let h be the height of the wall in feet and x the length of the ladder, also in feet. First we have: x = h + 2. When the top of the ladder is placed against the top of the wall a right triangle forms, with x the hypotenuse and h the vertical leg. Now the distance from the base of...

If you know how to factor it, you're more than half way there. y2 + 3y + 2 can be factored as (y+2)(y+1) so the equation becomes: (y+2)(y+1) = 0 Now you have a product of two real numbers equal to zero. This happens if and only if one of the factors is zero, that...

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(ex: algebra, chemistry)