math thank you~~~
Formulating Problems with Algebraic Language
1) The weight of an empty box and a book are 2kg and 3kg respectively. If the total
weight of books and a box does not exceed 60kg, find the maximum number of books
inside the box.
2)Shui Wsh is the tutor of Chi Keung. The tutorial fee is $120 per hour. Each time, Shui
Wah has $10 travel allowance. Chi Keung has 4 tutorial lessons in July. The total
tutorial fee is $880. How many hours does Chi Keung have?
2 個解答
- RogerLv 51 十年前最愛解答
{The answer of senya in part 2 is incorrect}
(1) Let the no. of books be x,
2 + 3x <= 60 {<= less or equal to}
x <= 19.3
As the no. of books should be a whole no.
Maximum no. of books = 19
(2) Let x be the no. of hours
4(10) + 120x = 880
120x = 840
x = 7
Chi Keung has 7 hours of tutorial lessons
- 志仁Lv 61 十年前
1) Let there are x books
2+3x<60
3x<58
x<19.333
x=19
2) Let there be x hours
10(4) + 120x = 880
120x=840
x=6 hrs
