2. Louis has $m. The amount of money that Larry has is $3 more than 2 times of that of Louis. How much money does Larry have?
A.$(m/2+3)
B.$(m/2-3)
C.$(2m+3)
D.$(2m-3)
3.the length and the width of a rectangle are q cm and w cm respectively. its area is Acm2.which of the following formulae represents the relationship among the area of the retangle, its length and its width?
A. A=(1/2)qw
B.A=2(q+w)
C.A=q+w
D.A=qw
4.Charles had $m in an online game.He later set up a shop and employed some workers in the game. He spent $s and $w respectively for the purposes.the amount of money he now has is only half of that Ray.find the amount of money that Ray has. A.$(m-s+w)＊2 B.$(m-s-w)＊２ C.$(m-s-w)/2 D.$1/2(m-s-w)
5.Herman is x years old this year. the year of his mother is 8 more than 3 times of Herman’s age. (a)find Herman’s mother’s age this year A.3x+8 B.(1/2)x+8 C.3x-8 D.3(x+8) (b)If x=13,find the Herman’s mother’s age this year.
6.the air-conditioners at home have become old.the father has decided to change all n air-conditioners at home.the price of each new air-conditioners is $2000.the installation fee for each air-conditioner is $300
a) use algebraic expression to represent the amount of money required to change the n air-conditioners. b)given that there are 4 conditioners that have to be changed at home.how much is required for changing the air-conditioners at home this home?
7.William has $2p.He has spent $130 buying an electronic pet.He has also spent $p buying a portable electronic game console. a)Use algebraic expression to represent the amount of money he has left. A.$(p+130) B.$(p-130) C.$(2p-130+p) D.$(3p-130) (enter the alphabet as the answer.)
b)given that the price of the portable electronic game console is $1360.how much money does William have after he has bought the game console?
8.among three consecutive integers,the smallest one is x.the sum of the three numbers is A.set up a formula representing the relationship between A and x. A=?
9a.Which of the following formulas represents the relationship among the area of a trapezium(A),its upper base(u),its lower base(b) and its height(h)? A.A=buh B.A=(u+b＊h)/2 C.A=(u+b)＊h D.A=[(u+b)＊h]/2 (enter the alphabet as the answer.) 9b.if u=4,b=6 and h=3,find the value of A.
