exam Maths Puzzle Numerical Ability

solve each equation The Distributive Property Fraction:

2/9 (x+18)=36

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exam Other Question

Algebraically derive the compound amount factor (f given A, i, n) with is:
F=A[((1+i)^n -1)/i] How many pounds of extra-lean-hamburger that is 7% fat must be mixed with 30 pounds of hamburger that is 15% fat to obtain a mixture that is 10% fat?