91Ó°ÊÓ

When can you solve a rational equation by cross multiplying? Explain.

A fraction that contains a fraction in its numerator or denominator is called a(n) ______.

VOCABULARY Explain how direct variation equations and inverse variation equations are different.

Describe how to multiply and divide two rational expressions

Explain how adding and subtracting rational expressions is similar to adding and subtracting numerical fractions.

Find the sum or difference. \(\frac{x}{16 x^2}-\frac{4}{16 x^2}\)

Solve the equation by cross multiplying. Check your solution(s). $$\frac{9}{3 x}=\frac{4}{x+2}$$

Solve the equation by cross multiplying. Check your solution(s). $$\frac{6}{x-1}=\frac{9}{x+1}$$

So far in your volleyball practice, you have put into play 37 of the 44 serves you have attempted. Solve the equation \(\frac{90}{100}=\frac{37+x}{44+x}\) to find the number of consecutive serves you need to put into play in order to raise your serve percentage to \(90 \%\).

Find the least common multiple of the expressions. \(2 x, 2 x(x-5)\)