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The bill consisted of a fixed charge of $13.50 plus a charge of $0.0 075 per gallon for the water used in the quarter. For how many gallons of wate r was Judy charged for the quarter? gallons Click on the answer box, then type in a number. Backspace to erase. ´ÓÊýѧ֪ʶÀ´Ëµ£¬±¾Ìâ»ù±¾Ï൱ÓÚÖйúСѧ¸ßÄê¼¶ÊýѧӦÓÃÌâµÄÄѶȣ¬ÔÚÔĶÁÀí½â׼ȷµÄ ǰÌáϽâÌâÓ¦¸ÃûÓÐÌ«´óÄѶȡ£±¾Ìâ¿ÉÒÔ¿´×÷ÊÇETSÌá³öµÄ¡°Ôö¼ÓÈÕ³£ÕæÊµ±³¾°ÎÊÌ⡱µÄÒ» ¸öÀý×Ó¡£ Àý2£¬The average (arithmetic mean) of the 11 numbers in a list is 14. If the a verage of 9 of the numbers in the list is 9, what is the average of the other 2 numbers? 11¸öÊýµÄËãÊõƽ¾ùÊÇ14¡£ ÈôÆäÖÐ9¸öÊýµÄËãÊõƽ¾ùΪ9£¬ÔòʣϵÄ2¸öÊýµÄƽ¾ùÊýÊǶàÉÙ£¿ ±¾Ì⿼²ìµÄÊÇ¿¼Éú¶ÔËãÊõ ƽ¾ùÖµÕâÒ»¸ÅÄîµÄÈÏʶ¡£Èç¹ûN¸öÊýµÄËãÊõƽ¾ùÊÇX£¬ÔòÕâN¸öÊýÖ®ºÍΪN¡ÁX¡£Ö»ÒªÕÆÎÕÁËÕâ Ò»µã¶ÔÓÚÄÇЩ¿¼²ìËãÊõƽ¾ùÖµµÄÌâÄ¿¾ÍÓ¦¸ÃÓÈжø½âÁË¡£´ÓÕâÀïÎÒÃÇÒ²¿ÉÒÔ¿´³öÔڸĸïºó µÄGREÊýѧÖУ¬¶ÔÓÚһЩͳ¼ÆÑ§ÊýÖµ£¨±ÈÈçËãÊõƽ¾ù¡¢¼«²î¡¢±ê×¼·½²î¡¢ÖÐÊýµÈ£©µÄÀí½âÒª ÇóÌá¸ßÁË¡£ ÎÒÃÇÔÙ¿´ÕâÑùÒ»µÀ±È½Ï´óСµÄÌâÄ¿£º Àý3£¬ Quantity A Quantity B The standard deviation of a set of 5 different int egers each of which is between 0 and 10 The standard deviation of a set of 5 d ifferent integers each of which is between 10 and 20 A. Quantity A is greater. B. Quantity B is greater. C. The two quantities are equal. The relationship c annot be determined from the information given. ±¾ÌâÒªÇó±È½Ï´¦ÓÚ[0,10]Ö®ÖеÄ5¸ö²»Í¬ÕûÊýµÄ±ê×¼·½²îÓë´¦ÓÚ[10,20]Ö®ÖеÄ5¸ö²»Í¬ÕûÊý µÄ±ê×¼·½²îÖ®¼äµÄ´óС¡£Õâ¾ÍÒªÇó¿¼Éú¶ÔÓÚ±ê×¼·½²îÕâÒ»¸ÅÄîÓбȽϾ«È·ÉîÈëµÄÁ˽⡣±ê ×¼·½²îÌåÏÖµÄÊÇÒ»×éÊýÏà¶ÔÓÚËûÃǵÄËãÊõƽ¾ùÖµ¶øÑԵIJ¨¶¯·ù¶È£¬ºÍÕâ×éÊýËù´¦µÄÇø¼äû ÓÐÖ±½ÓÁªÏµ¡£Òò¶ø±¾ÌâӦѡÔñDÎÞ·¨Åжϡ£ 2£¬³öÏÖÁ˶àÏîÑ¡ÔñÌ⣬ҪÇó¿¼Éú°ÑËùÓзûºÏÌâÒâµÄ´ð°¸¶¼Ñ¡³öÀ´¡£ÓÉÓÚGREÊýѧ±¾Éí¿¼²ì µÄÊýѧ֪ʶ²¢Ã»ÓбäÄÑ£¬ËùÒÔÕâÖÖÌâÐͽö½öÊÇÔö¼ÓÁË¿¼Éú˼άµÄ¸´ÔÓÐÔ£¬²¢ÒªÇó¿¼Éú¸ü¼Ó ϸÐÄ¡£ Àý4£¬In triangle ABC, the measure of angle A is 25¡ã and the measure of angle B is greater than 90¡ã. Which of the following could be the measure of angle C ? Indicate all possible values. A. 12¡ã B. 15¡ã C. 45¡ã D. 50¡ã E. 70¡ã Click on your choice(s). ±¾Ì⿼²ìµÄÊÇÈý½ÇÐεĻù±¾ÐÔÖÊ£ºÄڽǺ͵ÈÓÚ180¶È¡£ÓÉÌâÒâ¿ÉÖª½Ç A½ÇBÖ®ºÍ´óÓÚ115¶È£¬Óɴ˵õ½0 3£¬³öÏÖÁËÌî¿ÕÌ⣺ Àý5£¬ House Prices Number of Houses $100,000 - $133,000 12 $ 134,000 - $166,000 25 $167,000 - $199,000 8 The table shows the distribution o f prices of 45 houses for sale in a certain region. Select two of the followin g choices and place them in the blanks below so that the resulting statement i s true. $175,000 $185,000 $190,000 at most $42,000 at least $57,000 If the hig hest price of the 45 houses is , then the range of the prices of the 45 houses is . Click on a choice, then click on a blank. ±¾Ìâ½áºÏÁËͼ±íÌâºÍ¼ÆËãÌâµÄÌØµã£¬²¢ÔÙ´ÎÌåÏÖÁËǰÊö¶ÔÓÚͳ¼ÆÑ§¸ÅÄîµÄ¾«È·ÈÏʶҪÇóÌá ¸ßµÄÒªµã¡£±¾Ì⿼²ìµÄÊǼ«²î£¨Range£©ÕâÒ»¸ÅÄ¼´Ä³Ò»¼¯ºÏÖеÄ×î´óÖµÓë×îСֵ֮¼äµÄ ²îÖµ¡£Ö»ÒªÁ˽âRangeµÄº¬Òå²¢ÇÒÀí½âÁ˱¾Ìâͼ±í£¬½âÌâÄѶȲ»´ó¡£±¾ÌâÖÐ×îµÍ·¿¼Û´¦ÓÚ$ 100,000µ½$133,000µÄÇø¼äÖ®ÖУ¬Òò´Ë¼«²î×î´óֵΪ×î¸ß·¿¼Û¼õÈ¥$100000£¬¼«²î×îСֵΪ ×î¸ß·¿¼Û¼õÈ¥$133000£¬Í¨¹ý¶ÔËù¸øÑ¡ÏîµÄÊÔÑé·¢ÏÖÖ»ÓзֱðÌî$190000ºÍat least $5700 0²ÅÄÜʹÕâ¾ä»°³ÉÁ¢¡£ 4£¬³öÏÖÁËÅжÏÌ⣬¼´ÒªÇó¿¼ÉúÅжÏijһµÈʽ»òijһÃüÌâµÄ¶ÔÓë´í Àý6£¬The symbol ∆ represents one of the four operations of addition, sub traction, multiplication, and division, and 3 ∆ 1 = 3. For each of the f ollowing equations, indicate whether the equation must be true, must be false, or could be either true or false. Equation Must Be True Must Be False Could B e True or False 6 ∆ 2 = 3 6 ∆ 2 = 4 6 ∆ 2 = 12 Click on your choices. Click on the answer box, then type in a number. Backspace to erase. GREÖгöÏֵķdz£¹æÊýѧ·ûºÅ¿ÉÒÔ¿´³ÉETS×Ô¼º¶¨ÒåµÄÒ»ÖÖÔËËã¡£±¾ÌâÖУ¬·ûºÅ∆´ú±í µÄÊǼӼõ³Ë³ýËÄÖÖËÄÔòÔËËãÖеÄijһÖÖ£¬¶øÇÒ3∆1£½3£¬ÓÉÕâЩÒÑÖªÌõ¼þ¿ÉÒÔÍÆ³ö 8710;¿ÉÒÔÊÇ¡Á£¬Ò²¿ÉÒÔÊǡ¡£½ÓÏÂÀ´¾Í¿¼²ì¿¼Éú¶ÔÓÚmust be true¡¢could be trueÕâÀà Âß¼ÅжÏÓïÑÔµÄÀí½âÁË¡£Must be trueÒâΪ±ØÈ»ÕýÈ·£¬ÔÚÈκÎʱºò¶¼²»¿ÉÎ¥±³£»Could be trueÒâΪ¿ÉÒÔÕýÈ·£¬¼´´æÔÚÕýÈ·µÄ¿ÉÄÜ¡£ Òò´ËµÚÒ»¸öµÈʽ6∆2£½3ÔÚ∆´ú±í¡Á ʱ´íÎ󣬵«ÔÚ∆´ú±í¡ÂʱÕýÈ·£¬Òò´ËµÚһʽӦΪcould be true or falseÓпÉÄܶÔÒ² ¿ÉÄÜ´í£» µÚ¶þ¸öµÈʽ6∆2£½4²»ÂÛ∆´ú±í¡Á»ò¡Â¶¼²»ÕýÈ·£¬Òò´ËµÚ¶þʽӦΪmu st be falseÒ»¶¨´íÎó£» µÚÈý¸öµÈʽ6∆2£½12ÔÚ∆´ú±í¡ÁʱÕýÈ·£¬µ«ÔÚ∆ ;´ú±í¡Âʱ´íÎó£¬Òò´ËµÚÈýʽͬµÚһʽһÑù£¬Ò²ÊÇÓпÉÄܶÔÒ²ÓпÉÄÜ´í¡£ 5£¬±È½Ï´óСµÄÌâÄ¿ÓÉÔÀ´µÄÿ¸öSection15µÀÌâÏ÷¼õΪ10µÀÌ⣬ͼ±íÌâÈÔÈ»ÊÇ5µÀ£¬¶øÇÒÑù ÌâÖÐͼ±íÌâµÄÀàÐÍ¡¢ÄѶȺÍÒÔǰÏà±ÈûÓÐʲô±ä»¯¡£ ×ܶøÑÔÖ®£¬¸Ä¸ïºóµÄGREÊýѧÔÚÊýѧ֪ʶºÍÄѶÈÉϲ¢Ã»Óб¾Öʱ仯£¬Ö»ÊÇÌâÄ¿ÊýÁ¿ºÍÐÎʽ·¢ ÉúÁËһЩ±ä»¯¡£Ö»Òª¶ÔÐÂÌâÐÍÓгä·ÖÁ˽âÖª¼ºÖª±Ë£¬ÐÂGREµÄÊýѧ²¿·Ö¶ÔÖйú¿¼Éú²»»áÓÐÌ« ´óÓ°Ïì¡£ [ ±¾Ìû×îºóÓÉ Âó¶µ^@^ ÓÚ 2006-10-8 18:36 ±à¼ ] -- ¡ù À´Ô´:£®ÄϾ©´óѧС°ÙºÏÕ¾ http://bbs.nju.edu.cn [FROM: 221.226.3.228] |
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