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View Full Version : math question?? Denro 08-18-2005, 05:03 PM What is the equation of a line passing through the origin while being parallel to 5x + 2y = -7? A. 2x – 5y = 0 B. 2x – 5y = 7 C. 2x + 5y = 0 D. 5x – 2y = -7 E. 5x + 2y = 0 Can somebody help me out with this? break it down like im in 5th grade., chordata 08-18-2005, 06:08 PM Set up both equations so that they are in the same general format of y=mx+b where m = slope. The 2 equations that have the same slope will be parallel. ex. y = -5/2x - 7/2 An equation of a line that passes through the origin will have a b value of 0, thus the answer is E. Denro 08-18-2005, 06:30 PM Set up both equations so that they are in the same general format of y=mx+b where m = slope. The 2 equations that have the same slope will be parallel. ex. y = -5/2x - 7/2 An equation of a line that passes through the origin will have a b value of 0, thus the answer is E. thanks..i really suck at math.. can u help me with trig tan xo = tan (90 – x)o when A. x = 0 B. x = -30 C. x = -45 D. x = -60 E. x = -90 joonkimdds 08-18-2005, 10:13 PM . E. coli 08-18-2005, 10:27 PM thanks..i really suck at math.. can u help me with trig tan xo = tan (90 – x)o when A. x = 0 B. x = -30 C. x = -45 D. x = -60 E. x = -90 The answer is C. Tangent is positive on quadrant 1 and 3, and negative on quadrant 2 and 4. Therefore, the answer must be on quadrant 2 and 4, since all the answer choices is negative. For tan, all you have to know is that tan 0= 0, tan 45 = 1, and tan 90= infinity. Therefore, Tan -45 = -1, and tan 135 = -1. The answer is C. joonkimdds 08-18-2005, 10:30 PM The answer is C. Tangent is positive on quadrant 1 and 3, and negative on quadrant 2 and 4. Therefore, the answer must be on quadrant 2 and 4, since all the answer choices is negative. For tan, all you have to know is that tan 0= 0, tan 45 = 1, and tan 90= infinity. Therefore, Tan -45 = -1, and tan 135 = -1. The answer is C. what's 0 that he put for each sides? i know tan x but what's tan xo? joonkimdds 08-18-2005, 10:36 PM The answer is C. Tangent is positive on quadrant 1 and 3, and negative on quadrant 2 and 4. Therefore, the answer must be on quadrant 2 and 4, since all the answer choices is negative. For tan, all you have to know is that tan 0= 0, tan 45 = 1, and tan 90= infinity. Therefore, Tan -45 = -1, and tan 135 = -1. The answer is C. what's 0 that he put for each sides? i know tan x but what's tan xo? tinman831 08-19-2005, 02:10 AM what's 0 that he put for each sides? i know tan x but what's tan xo? i think thats the symbol for degrees |