单选题If a line is perpendicular to the line 2x + 6y = 18, what is its slope?A-1/3B1/3C-3D3E1/2
单选题
If a line is perpendicular to the line 2x + 6y = 18, what is its slope?
A
-1/3
B
1/3
C
-3
D
3
E
1/2
参考解析
解析：
The slope of the given line 2x + 6y = 18 is -1/3. Perpendicular lines have slopes that are negative reciprocals of each other, so the slope of the line perpendicular to the given line is 3.
The slope of the given line 2x + 6y = 18 is -1/3. Perpendicular lines have slopes that are negative reciprocals of each other, so the slope of the line perpendicular to the given line is 3.
相关考题：
publicclassTest{12.publicvoidfoo(){13.assertfalse;14.assertfalse;15.}16.publicvoidbar(){17.while(true){18.assertfalse;19.}20.assertfalse;21.}22.}Whatcausescompilationtofail?() A.Line13B.Line14C.Line18D.Line20
Click the Exhibit button.Given:What is the result?() A.Line 26 prints a to System.out.B.Line 26 prints b to System.out.C.An exception is thrown at line 26 at runtime.D.Compilation of class A will fail due to an error in line 6.
Given:WhichlineofcodemarkstheearliestpointthatanobjectreferencedbyintObjbecomesacandidatefor garbagecollection?() A.Line16B.Line17C.Line18D.Line19
The primary line module has failed and the spare line module is nowactive.What occurs,by default,when the primary line module returns to an operational status?() A.The primary line module is inactive for five minutes and then becomes active.B.The primary line module is in standby mode，while the spare line module remains active.C.The primary line module becomes active immediately and the spare line module becomes inactive.D.The primary and spare line modules are active for five minutes，after which time the spare line module becomes inactive.
What provides little or no indication that a vessel is dragging anchor ________．A.Increasing radar range to a fixed object aheadB.Drift lead with the line leading perpendicular to the centerlineC.Vibrations felt by placing a hand on the cableD.Changing bearings to distant fixed objects abeam
When carrying out a parallel track search pattern，the course of the search units should normally be which of the following ________．A.In the same direction as the anticipated driftB.In the opposite direction of the anticipated driftC.Perpendicular to the line of anticipated driftD.Downwind
Cyclones tend to move ______.A.perpendicular to the isobars in their warm sectorsB.parallel to the isobars in their warm sectorsC.parallel to the line of the cold frontD.perpendicular to the line of the cold front
What is the difference between a CSU/DSU and a modem?（）A、A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.B、A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.C、A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.D、A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
11. public class Test { 12. public void foo（） { 13. assert false； 14. assert false； 15. } 16. public void bar（）{ 17. while（true）{ 18. assert false； 19. } 20. assert false； 21. } 22. } What causes compilation to fail？（） A、 Line 13B、 Line 14C、 Line 18D、 Line 20
多选题Which of the following equations are for lines which are perpendicular to the line y=2x+4?A2y +x = 5B2y –x = 3Cx + 2y = 7Dx – 2y = 4E4y +2x = 0
单选题What term indicates the line drawn at the top of the flat plate keel（）.ABase lineBMolded lineCDesigner's waterlineDKeel line
单选题You are handling a mooring line and are instructed to Check the line.What should you do（）.AEnsure the bight is not fouled by taking up slackBPay out the line smartly and keep it free for runningCSecure the line by adding more turnsDSurge the line so it maintains a strain without parting
单选题A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）AGreat circleBEquatorCSmall circleDMeridian
单选题Line l passes through the origin and is perpendicular to the line given by the equation 2x + y = 8. Which of the following points is NOT on line l?A(-4, -2)B(-1,1)C(2,1)D(4,2)E(7,3.5)
单选题Click the Exhibit button. What is the result？（）A Line 26 prints "a" to System.out.B Line 26 prints "b" to System.out.C An exception is thrown at line 26 at runtime.D Compilation of class A will fail due to an error in line 6.
单选题The equator is（）.Athe primary great circle of the Earth perpendicular to the axisBthe line to which all celestial observations are reducedCthe line from which a celestial body's altitude is measuredDAll of the above
单选题The primary line module has failed and the spare line module is nowactive.What occurs，by default，when the primary line module returns to an operational status？（）AThe primary line module is inactive for five minutes and then becomes active.BThe primary line module is in standby mode，while the spare line module remains active.CThe primary line module becomes active immediately and the spare line module becomes inactive.DThe primary and spare line modules are active for five minutes，after which time the spare line module becomes inactive.
单选题What provides little or no indication that a vessel is dragging anchor? （）AIncreasing radar range to a fixed object aheadBDrift lead with the line leading perpendicular to the centerlineCVibrations felt by placing a hand on the cableDChanging bearings to distant fixed objects abeam
单选题Given： Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）A Line 16B Line 17C Line 18D Line 19
单选题Given： What is the result？（）A Compilation fails due to an error in line 23.B Compilation fails due to an error in line 29.C A ClassCastException occurs in line 29.D A ClassCastException occurs in line 31.E The value of all four objects prints in natural order.
单选题11. public class Test { 12. public void foo（） { 13. assert false； 14. assert false； 15. } 16. public void bar（）{ 17. while（true）{ 18. assert false； 19. } 20. assert false； 21. } 22. } What causes compilation to fail？（）A Line 13B Line 14C Line 18D Line 20
单选题A “spring line” is（）.Aany wire rope used for mooringBa fire-warpCa mooring line running diagonally to the keelDa mooring line perpendicular to the keel
单选题What is the result？（）A Compilation of class A fails.B Line 28 prints the value 3 to System.out.C Line 28 prints the value 1 to System.out.D A runtime error occurs when line 25 executes.E Compilation fails because of an error on line 28.
单选题What is normally used to pass a mooring line to a dock?（）ADistance lineBGantlineCHeaving lineDTag line
单选题Given： What is the result？（）A BB The code runs with no output.C Compilation fails because of an error in line 12.D Compilation fails because of an error in line 15.E Compilation fails because of an error in line 18.
单选题A drift lead indicates that the vessel is dragging anchor when the line is（）.Ataut and leading forwardBslackCleading out perpendicular to the centerlineDleading under the hull