Mathematics in English F.1

Q1: Divide the difference of 3 and w by 8a , where w is larger than 3 .

(w-3) / 8a


Q2: 3q x p x 1/2 q square x 8p

12q^3p^2

if question is 3q x p x 1/(2q^2) x 8p, answer will be 12p^2/q


Q3: There are 50 $1-coins and $2-coin in total. If the number of $1-coins is 2n, how many $2-coins are there ?

50 - 2n


4Q: Jenny has $y. Ken has money twice as much as Jenny . If Ken used $15 , how much money does he have ?

2y - 15


5Q: 2x-9 /3 = x-2

2x - 9/3 = x - 2
2x - 3 = x - 2
x = 1

if question is (2x-9)/3 = x - 2
2x - 9 = 3x - 6
2x - 3x = -6 + 9
-x = 3
x = -3



6Q: 5x+ 3 = 2x+21
5x - 2x = 21 - 3
3x = 18
x = 6

7Q: The selling price of a book is $72 and the corresponding profit percent is 20%
a)Find the cost of the book
72 / (1+20%)
= 72 / 1.2
= 60

b)If the bookseller want to earn 15% more , what should be the marked price ?
60 x (1 + 20% + 15%)
= 60 x 1.35
= 81


8Q:The cost of a handbag is $600 . If a shop makes a 10% profit after giving a 40% discount what is the marked price and the selling price ?

selling price : 600 x (1+10%) = 660

marked price : 660 / (1-40%) = 1100

5Q:很簡單 2x-9 /3 = x-2 將=符號移動.代數和數字分開,若要將一組數字移動需要將-變+,/ 變x符號.先x/後+-所以9/3即3#2x-x=+9/3-2=x=3-2X=1代入2x1-3=x-2,-1=-1#
6Q: 5x+ 3 = 2x+215x-2x=21-3,3x=18,x=6#

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