Write an equation of the line.
A. y = 4x
B. y = 4x + 2
C. y = -4x + 2
D. y = 
x + 2
Answer: B
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In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
It is possible to take a walk though this town, starting on the South Bank, crossing each bridge once (and only once) and ending
A. on island C. B. back on the South Bank. C. on island B. D. on the North Bank. E. none of these
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__f1q186g2.jpg" alt="" style="vertical-align: -8.0px;" /> 
and the demand vectors for the industries are: 
What is the total demand for the four types of energy from both the consumers and the energy industries?
What will be an ideal response?
Find three solutions for the equation.x + y = 11
A. (3, 8), (4, 7), (5, 6) B. (3, 8), (4, 7), (5, 12) C. (3, 14), (4, 15), (5, 16) D. (3, 11), (4, 10), (5, 9)
Solve the problem.A paper boy collected $7.55, part in nickels and part in dimes. If the number of nickels was 6 more than one-half the number of dimes, how many nickels were there?
A. 68 nickels B. 35 nickels C. 45 nickels D. 58 nickels