Answer:
x=4
Step-by-step explanation:
all you need to do is the 3rd root of 64
 which is 4.
 
        
             
        
        
        
Answer:
w = 6
RS = 13
Step-by-step explanation:
RS + ST = RT
(2w + 1) + (w - 1) = 18
3w = 18
; w = 6
Hence the value of RS = 2(6) + 1
; RS = 13
AC = AB + BC
56 = (x + 16) + (5x + 10)
56 = 6x + 26....then rearrange the equation to form...;
56 - 26 = 6x
30 = 6x...
where...; x = 5
AB = 5 + 16 and BC = 5(5) + 10
;AB = 21 ;BC = 35
 
        
             
        
        
        
x/20 = 21/14 (similar proportions)
x/20 = 3/2 (simplify by canceling out a factor of 7) 
x = 30 
 
        
                    
             
        
        
        
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For question 4: you have to do (y2 - y1) divided by (x2 - x1) to get the rise over run...
5-2
——. = 3/4
11 - 7
For question 5: input the values of x,y and the gradient into the equation of a line.....
y = mx+ c
-8 = 3(-2) + c
-8 = -6 + c
-2 = c
therefore: 
y = 3x - 2
Hope this helps! Any questions let me know :)