Answer:
Step-by-step explanation:
4b - 16b + 12 = 48
-12b + 12 = 48
-12b = 36
b = -3
 
        
             
        
        
        
Answer:
1023.75
Step-by-step explanation:
The sum of a geometric sequence is 
sum = a( 1 - r^n) / (1-r)
where a is the first term  r is the common ratio and  r^n is the nth term
We need to find the common ratio
r = 256/512 = 1/2
sum = 512 ( 1 - 1/2^12) / ( 1-1/2)
        =512( 1-.000244141) / (.5)
        =512(.999755859) /.5
      =1023.75
 
        
                    
             
        
        
        
1. 
a) metres to centimetres :
 multiply length by 100
b) metres to millimetres:
multiply length by 1000
c) kilograms to grams:
multiply the mass value by 1000
d) litres to millilitres :
multiply volume by 1000
2.
a) 3 m = 3× 100 = 300 cm
b) 28 cm = 28 × 10 = 280 mm 
c) 2.4 km = 2.4 × 1000 
 = 24 × 10^-1 × 10^3
 = 24 × 10^2 =2400 m
d) 485 mm =485 / 10 
 = 485 / 10 ^1
 = 485 × 10 ^-1
 = 48.5 cm
e) 35 cm = 35 / 100 
 = 35 /10^2
 = 35 × 10 ^ -2
 = 0.35 m
f) 2.4 m = 2.4 / 1000 
 = 24 × 10 ^-1 / 10^3
 = 24 × 10^-1 × 10 ^-3
 = 24 × 10 ^ -4
 = 0.0024 km
g) 2495 mm = 2495 /1000
 
 = 2495 /10^ 3
 = 2495 × 10 ^-3
 =2.495 m
 
 
        
             
        
        
        
Answer: To solve these types of questions what I always do is get a protractor if you have one and put it up against to where the dot is in the middle of the empty hole and then get a ruler or a pencil and make the line keep going to see what angle. In this case your answer is 65% I think.
 
        
             
        
        
        
Answer: 
Step-by-step explanation: Ok so it is backwerd to pas would be nagitv