Rewrite the rational expression using the specified denominator D.
, D = (y - 3)(y + 3)(y + 7)
A. 
B. 
C. 
D. 
Answer: C
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Sketch the subset on the real number line, and state whether the interval is bounded or unbounded. ? (-?, 3) ?
A. 
The interval is unbounded.
B.
The interval is unbounded.
C.
The interval is unbounded.
D.
The interval is bounded.
E.
The interval is unbounded.
Solve the equation.2 - 
= 6
A. x = ±4 B. x = -8 C. x = -4 D. The equation is a contradiction.
The energy economy of an area is composed of four industries: gas, coal, hydroelectric and nuclear. The three main consumers of energy are area residential consumers, a manufacturing plant, and a university. Assume that each consumer may use some of the energy produced by each industry, and also that each industry uses some of the energy produced by each of the other industries. The energy needs of each consumer and industry are represented by a demand vector whose entries, in order, give the amount of gas, coal, hydroelectric, and nuclear energy needed by each consumer or industry, in some convenient units. The demand vectors for the consumers are: src="https://sciemce.com/media/4/ppg__tttt0616191201__f1q183g2.jpg" alt="" style="vertical-align: -8.0px;" /> 
and the demand vectors for the industries are: 
Use the matrix operations on a graphing calculator to find the total demand for the four types of energy from only the consumers.
What will be an ideal response?
Solve.A rope is 30 ft long. How can the rope be cut in such a way that the ratio of the resulting two segments is 3 to 5?
A. 10 ft and 6 ft
B. 12 ft and 18 ft
C. 
ft and 
ft
D. 
ft and 
ft