Tìm các số thực x,y,z thỏa mãn đẳng thức sau

...........he isn't available, we will look for another consultant A. in the case that B. unless c. while d. when

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Giúp em từ câu 1-4 đến câu 4 gấp với ạ e cảm ơn

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Tìm a để chia hết … 2x^2+7x+6 chia hết cho x-a

1 My mother cooks and _____ for groceries. My farther cleans the house and _____the heavy lifting. A. shop/ brings B. shops/ does C. go/ do D. go shopping/ bring 2 I think you likes _____ the house every day. A. to sweep B. to swept C. sweeping D. to sweeping 3 My sister often _____ and _____ the clothes. A. laundry/ ironing B. does a laundry/ ironing C. does the laundry/ irons D. do the laundry/ irons 4 I often do the washing___ and my brother take ____ the rubbish. A. up/ out B. up/ up C. out/out D. out/ up 5 My wife _____most of the _____ around the house. A. handle/ household B. handling/ chores C. handles/ households D. handles/ chores 6 My mother is a _____ while my mother is a _____. A. homemaking/ breadwinner B. homemaker/ breadwinning C. homemaker/ breadwinner C. homemakers/ breadwinners 7 My husband is _____for household _____. A. responsible/ finance B. responsibility/ financial C. responsibility/ finance C. responsible/ financial 8 She is _____ while her farther is _____ appliances. A. clears the home/ fixes B. cleans the home/ fixes C. cleaning the house/ fixing D. clear the house/ fixing 9 He hardly _____ and _____. A. cooking/ emptying B. cook/ empty C. do the cooking/ empty D. does the cooking/ empties 10 They are trying _____ the house. A. to tidying up B. to tidy up C. tidying up D. tidies up 11 She is _____ urgent report _____ the moment. A. works on/ in B. working at/ in C. working on/ at C. works at/ at 12 I have ___ the children ____ my husband works to earn money. A. to look up/ or B. looks after/ but C. to looking up/ so D. to look after/ and 13 Husbands who _____ make their wives happy. A. splits homework B. share housework C. shares housework D. split homework 14 Women whose husbands do not _____ the household chores are unhappy. A. contribute to/ B. contribution/ C. contribution to/ D.contribute 15 They are more _____ illness and tend _____ more about divorce. A. vulnerable with/ to think B. vulnerable to/ thinking C. vulnerable to/ to think D. vulnerable with/ thinking 16 Parent must _____ a good example for the children. A. take B. make C. set D. show 17 Mum and dad can are not critical _____ each _____. A. of/ other B. on/ another C. in/ other D. at/ another 18 I can’t find _____ to work well together _____ you. A. something/ to B. a way/ with C. ways/ to D.some way/ with 19 We hate _____ the dishes because we often break things. A. to wash B. washing C. doing D. to do 20 Both men and women have equal chances _____. A. to recreation B. to create C. for create D. for recreation 21 _____ is sharing housework and childcare evenly. A. Equal shared parenting B. Equal parenting shared C. Equally shared parenting D. Equally parenting shared 22 _____ is a way of _____ a problem. A. Solving/ solution B. Solution/ solve C. Solve/ solution D. Solution/ solving 23 Solution is a way of _____ difficult situation. A. deal to B. dealing to C. dealing with D. deal with 24 She wants to stay at home and _____ her children. A. nurture B. natural C. nature D. nurturing 25 Balance is a state where things are _____ weight and force. A. equal B. of equal C. equal to D. equal on

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Tìm giá trị nhỏ nhất của các biểu thức sau

Thường ngày vào lúc 11h, khi Nam tan học và về nhà thì bố Nam cũng đạp xe đón Nam về nhà cho nhanh keo nắng. Nếu bố Nam xuất phát đúng lúc Nam rời trường về nhà thì hai bố con gặp nhau sau 30 phút ở một vị trí nhất định. Nhưng hôm đó do có viêc nên Nam rời trường về nhà muộn hơn thường ngày 15 phút, vì thế vị trí Nam gặp bố cách vị trí thường ngày vân gặp 400m. Quãng đường từ nhà đến trường là 5km. Tìm vận tốc của 2 bố con Nam