exam Maths Puzzle Numerical Ability

How many pounds of a 12% aluminum alloy must be mixed with 400 pounds of a 25% aluminum alloy to make a 17% aluminum alloy?

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exam Other Question
s = 26[163339] - [163555]2 / 812 Rewrite each equation as a function of x.
Problem: -3x + 4y = 11


4y = 3x + 11
y = -3/4x + 11
f(x) = -3/4x + 11