1.tomcaughtthreekindsofinsectsinonetank.theyarespiders,dragonflieswithsixfeetandtwoparisofwingsaswellascicadaseswithsixfeetandonepairofwings.tomcounted18insectsinthetank,and118feetand20parisofwings.doyou

Question

1 .tom caught three kinds of insects in one tank .they are spiders,dragonflies with six feet and two paris of wings as well as cicadases with six feet and one pair of wings .tom counted 18insects in the tank,and 118 feet and 20 paris of wings.do you know how many spiders,dragonflies and cicadases are there respectively?
2.mr.zhang buys some sweaters and trousers.the total number of the clothes is 21,and zhang spends 439 yuan.we know each sweater costs 24 yuan and each trousers cost 19yuan.how many sweaters and trousers does mr.zhang buy?
3.my father changes one 50 yuan note and one 5 yuan note into fifty-pieces of 2yuan note and 5 jiao note.how many 2yuan notes and 5 jiao note are there respectively?

Answer 1

1.spider=5,dragonfly=7,cicadas=6
2.sweater=8,trousers=13
3.2yuan=20,5 jiao=30