a)How much was their total monthly salary?
b)If m=10000, the monthly salary of Mr. Lee was $__
2.the original weight of Miss Chan was 75kg. She lost 2p kg last month.She gained p kg this month.
a)find the weight of Miss Chan this month:
A. (75-p) kg B.(75-2p) kg C.(75-3p) kg D.(75+3p) kg
b)If p=5,find the weight of Miss Chan this month (unit:kg) 3.the original length of a square was x cm.each side was now increased by a cm. a)what was the new perimeter? A. 2xa cm B.xa cm C.4x+a cm D.4(x+a) cm b)If x=4 cm and a=2 cm,find the new perimeter
4.Yuki had x pieces of $1.4 stamps and y pieces of $3 stamps. a)find the total value of the stamps she had. b)if x=10 and y=8, find the total value of the stamps she had.
5.the price of a normal toothbrush was $p. the price of an electrical toothbrush was 10times of that of a normal one. The Lau’s family bought 2 normal toothbrushes and 1 electrical toothbrush. a)represent the amount required in algebraic expression
b)if p=10,find the total expense for buying toothbrushes for Mr Lau’s family 6.May had $c of pocket money every month. She spent $150 on transportation. Also,she bought magazines 2 times in a month each time she spent $a. she saved the remaining amount. Find the amount she saved in each month $M
7.given a+b+c=0, find the value of (a+b)(a+c)(b+c)+abc 8.in Mingo’s pet shop, there were some dogs and c dog cages. Mingo put d dogs into each cages.there were 4 dogs cages and 2 dogs left in the shop. Which of the following
algebraic expressions correctly represents the total number of dogs? A.cd-2d B.d(c-4)=2 C.cd D.(c-4)(d-2) 8.in a commercial building,there were a sets of air-conditioners. Changing a set of air-conditioner costs 4500 dollars.
a) how much would be required to change all air-conditioners? b)if each set of air-conditioner could be sold at a price of k dollars, how much would be needed after changing all air-conditioners in the commercial building and then selling them out?
A. $4500ak B.$(4500a-4500k) C.$(4500a-ak) D.$(4500a-4500ak) 9.there is a two-digit number.its tenth digit is a. the unit dight is 3 more than half of the tenths digit. What is this two-digit number?