<span> here 
 7 7/8 
 = [ (8*7) + 7 ] / 8 
 = (56 + 7) / 8 
 =63 / 8 
 similarly, 
 3 1/4 
 =[ (4*3) + 1] / 4 
 = (12 + 1) / 4 
 = 13/4 
 ---------------------------- 
 now put the values 
 7 7/8 - 3 1/4 
 = 63/8 - 13/4 
 here, take LCM of 8 & 4 which is 8. 
 now, 
 [ (1*63) - (2 * 13) ] / 8 
 = (63 - 26) / 8 
 = 37/8 
 = 4 5/8........................[ here, divide 37 by 8 which gives reminder as 5 and divisible value as 4 ]</span>
        
                    
             
        
        
        
Answer:
4.6 hours 
Step-by-step explanation:
we first need to calculate the total distance he covered and total time taken whole for the journey.
Distance= speed X time 
time = Distance/speed 
let the total distance be X. he covers 2/5 if the journey first.
2/5 = 0.4
Time = 0.4x/45 hours
the remaining journey is 3/5x
he covers 1/3 X 3/5= 0.2x
time taken = 0.2/90 X hours
the remaining distance = 100× 1.2 = 120km
we add 0.4x + 0.2x to get the fraction he had covered
0.6x. 
the remaining distance was X - 0.6x = 0.4 X
thus 120 km represents 0.4x of the journey
we calculate now the value of X
0.4x = 120
X = 300km 
Total time taken = 0.4x/45 + 0.2/90 + 1.2 hours
replace X to get time 
2.7 hours + 0.7 hours + 1.2 hours
= 4.6 hours 
 
        
             
        
        
        
Y^2+36, because you square y and 6
        
                    
             
        
        
        
Answer:
if it is 1 cm answer is 3340cm
Step-by-step explanation:
1m = 100 cm
500m = 50000cm
change 16 .7 to m
16700
divide 
16700/500
33.4
change to cm = 3340
 
        
             
        
        
        
Answer:
4
Step-by-step explanation: