Exam Maths Puzzle Algebra

Solve for x using the quadratic formula.

0 = (-100/(1+x)) + (230/(1+x)^2) + (132 /(1+x)^3)

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Exam Other Question

Solve

1. If f(x)=x^2 and g(x)=x+2, find f[g(x)]

2. If f(x)=x^3+4 and g(x)=x+3, find [g,f](2)

3. Find the inverse of the function f(x)=4x+1.

4. Which of the following pairs of functions are inverse functions?

a. f(x)=3x-9, g(x)=-3x+9

b. f(x)=4-x, g(x)=4+x

c. f(x)=x+5, g(x)=x-5

d. f(x)=x, g(x)= -x The sum of the digits of a two-digit number is nine. If the original number is doubled, the result is eighteen less than twice the original number reversed. What is the original number?