Solve the given equation or inequality. If an equation is given, then write the solution set in set notation. If an inequality is given, then write the solution set in interval notation.
+ 7 = 9
A. {-9}
B. {-9, 9}
C. {-2, 2}
D. {2}
Answer: C
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Find an equivalent equation in rectangular coordinates.r(cos ? - sin ?) = 3
A. x - y = 9
B. x - y = 3
C. 
(x - y) = 3
D. x + y = 3
In calm waters, the oil spilling from the ruptured hull of a grounded tanker spreads in all directions. Assuming that the polluted area is circular, determine how fast the area is increasing when the radius of the circle is 20 ft and is increasing at the rate of 1/6 ft/sec. Round to the nearest tenth if necessary.
What will be an ideal response?
Simplify the expression.
?
?
Write the answer without using negative exponents. Assume that the variable is restricted to those numbers for which the expression is defined.
?
A. 
B. ?
C. ?
D. ?
Write each rational expression as an equivalent expression with the LCD of the two expressions as the denominator.
and 
A. 
; 
B. 
; 
C. 
; 
D. 
; 