1. subtract a from b, then multiply half of the ditterence by c' may be written as
A. b-2ac B. c- ac/2 C. a- bc/2 D. (a-b)c/2 E. (b-a)c/2
2.Simplify the following expressions:
a) 5a 2次方*(2a)3次方/10a 3次方
b) 4x 2次方*y/12x 3次方*y 4次方
c) (3pq 3次方)2次方(p 2次方q 3次方)
3. When the sum of 3 and three-quarters of the number is 21, find the number.
睇得明ge智商150
睇得明少少ge就120
睇唔明ge就110
我係睇唔明架..