Oi Kei asked in 科學及數學數學 · 1 decade ago

F.1的英文數

1)The priceof a television set is $2400 which is $200 less than 4 times the price of a radio.What is the price of the radio?

2)Which one of the following shows that a square number can be divided into the sum of two consecutive triangular numbers?

Update:

3)In the square sequence 1,4,9.16.........,if the nth term is 225 and the mth term is 324,find the values of n and m.

-2 -3既2次方 -3

4)-〔-----------)x----------------÷-----------------=?

0+(-3) 2 (-7)既2次方

Update 2:

5)If the total tuition fee is given by $(1500c+800),where c stands for the number of courses enrolled.

a)Mark has to pay $5300 as tuition fee to study Chinese Culture ,how many courses has Mark enrolled in?

b)Joan wants to join 2 courses.How much money should she pay?

Update 3:

6)Write down the munber pattern of the sequence 4,8,12.........

2 Answers

Rating
  • Bill
    Lv 6
    1 decade ago
    Favorite Answer

    1)The priceof a television set is $2400 which is $200 less than 4 times the price of a radio.What is the price of the radio?

    ans:

    2400=4x+200

    x=550

    2)Which one of the following shows that a square number can be divided into the sum of two consecutive triangular numbers?

    以下那一條公式表示出一個 次方數可以被the sum of2個連續既三角數整除

    你沒有提供公式

    3)In the square sequence 1,4,9.16.........,if the nth term is 225 and the mth term is 324,find the values of n and m.

    x square = y

    1x1=1

    2x2=4

    3x3=16

    n=15

    m=18

    -2 -3既2次方 -3

    4)-〔-----------)x----------------÷-----------------=?

    0+(-3) 2 (-7)既2次方

    i dont know what this question means

    0+(-3) x 2 x (-7)?

    =42

    5)If the total tuition fee is given by $(1500c+800),where c stands for the number of courses enrolled.

    a)Mark has to pay $5300 as tuition fee to study Chinese Culture ,how many courses has Mark enrolled in?

    5300=1500c+800

    C=3

    b)Joan wants to join 2 courses.How much money should she pay?

    1500(2)+800=3800

    6)Write down the munber pattern of the sequence 4,8,12.........

    y=4x

  • 1 decade ago

    (1)Let the price of the radio is $x

    hence 4x-200=2400

    x=650

    (2)你應該打漏咗一啲嘢

    (3)The term of the square sequence is T(x)=x^2

    the nth term is 225 therefore T(n)=n^2=225

    hence n=15, so 225 is the 15th of the term

    T(m)=m^2=324

    m=18, so 324 is the 18th of the term

    (4)???

    (5)(a)$5300=$(1500c+800)

    c=3

    hence he has enrolled 3 courses

    (b)$[1500(2)+800]=$3800

    hence she has to pay $3800 for the course

    (6)If you mean its term, it's T(n)=4n

    Source(s): me
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