Answer:
Direct & Inverse Proportion (H) - Version 2 January 2016 . A collection of 9-1 Maths GCSE Sample and Specimen questions from AQA, . 1. 2. Write an expression for y in terms of x. [4]. 2. A pebble is thrown vertically upwards. . (b) Find the initial speed of the pebble if the maximum height reached is 16 m. . T is given by.
 
        
             
        
        
        
Answer:
   about 20
Step-by-step explanation:
The numbers round to 600/30 = 20, which is a reasonable estimate.
You can refine this by doing the next step of long division:
   29×20 = 580
Subtracting this from 591.3 give 11.3, so the fraction is ...
   11.3/29 ≈ 10/30 = 1/3
A better estimate is 20 1/3.
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A calculator tells you the quotient is about 20.3897.
 
        
             
        
        
        
Answer:
f'(x) = b
Step-by-step explanation:
f(x) = bx 
f' (x) = d/dx (bx)
using d/dx ( a * x ) = a
f' (x) = b <-- solution.