91Ó°ÊÓ

Write each statement using symbols. The product of 2 and \(x\) is the product of 4 and \(6 .\)

Add, subtract, or multiply, as indicated. Express your answer as a single polynomial in standard form. $$ (x+1)\left(x^{2}+2 x-4\right) $$

Perform the indicated operation and simplify the result. Leave your answer in factored form. $$ \frac{7}{x-3}-\frac{3}{x+1} $$

Write each statement using symbols. The difference \(x\) less 2 equals \(6 .\)

A circular swimming pool that is 20 feet in diameter is enclosed by a wooden deck that is 3 feet wide. What is the area of the deck? How much fence is required to enclose the deck?

Multiply the polynomials using the FOIL method. Express your answer as a single polynomial in standard form. $$ (3 x+1)(2 x+1) $$

Multiply the polynomials using the FOIL method. Express your answer as a single polynomial in standard form. $$ (x-4)(x+2) $$

In Problems 55-57, use the facts that the radius of Earth is 3960 miles and 1 mile \(=5280\) feet. The conning tower of the U.S.S. Silversides, a World War II submarine now permanently stationed in Muskegon, Michigan, is approximately 20 feet above sea level. How far can you see from the conning tower?

Evaluate each expression. $$ 4 \cdot(9+5)-6 \cdot 7+3 $$

Multiply the polynomials using the FOIL method. Express your answer as a single polynomial in standard form. $$ (x-2 y)(x+y) $$