Multiply and, if possible, simplify.
? 
A. 21xy
B. 2
C. 21
D. 2xy
Answer: B
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Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. p-9
B. 
C. p9
D. p-5
Find an approximation of the area of the region R under the graph of the function f on the interval [a, b]. Use n subintervals and choose the representative points as indicated.
?
; 
; 
; left end points
?
A. 6.985 sq units;
B. 6.495 sq units;
C. 6.1 sq units;
D. 6.625 sq units;
For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = 
; g(x) = 
;
Find f + g.
A. (f + g)(x) = 
; (-?, 0) ? (0, ?)
B. (f + g)(x) = 
; (-?, 
? 
, ?)
C. (f + g)(x) = 
; (-?, 
? 
, ?)
D. (f + g)(x) = 
; (-?, 
? 
, ?)
Provide an appropriate response.Show that the points P1(2, 4), P2(5, 2), and P3(7, 5) are the vertices of a right triangle.
What will be an ideal response?