I hope this helps you 
x=3. (27x+2)
x=81x+6
80x=-6
x=-3/40
        
                    
             
        
        
        
<span>let the angles be x and y.
as they are compliment
x+y=90 
also given
x=7y 
substituting value of x in first equation
7y+y=90
8y=90 
therefore 
y=11.25
x=7*y=78.75</span>
        
             
        
        
        
Answer:
Step-by-step explanation:
a) Here, the first term is .48 and the common ratio is 1/100 (since each new 48 is 1/100 th of the previous 48).                                   a
 Use the formula s = sum of geometric series = -----------
                                                                                   1 - r
                                            0.48              48
which in this case is s = --------------- = ------------ = 48/99 = 16/33
                                           1 - 1/100        100 - 1
Check this result by finding 16/33 on a calculator.  Is the result equal to 0.484848484848.... ?  Yes
b) Here we have the bar over the 8 only.  0.48 with the bar over the 8 is equivalent to 0.4888888888 ...
                                                               0.08
or 0.4 + 0.0888888888 ...      or 0.4 + ------------
                                                                 1 - 1/10
                                               
                                               0.08                       8
and this simplifies to 0.4 + ------------  =  0.4 + ---------
                                                 9/10                      90
Evaluating this last result on a calculator results in 0.488888888 ... 
c)  0.48 expressed as a fraction is  48/100 = 12/25