Let the original number be ‘x’
Then half of that number= 1/2x or simply x/2
Similarly one fifth of that number = x/5
According to the question
x+x/2+x/5=51
Taking LCM
10x/10+2x/10+5x/10=51
Multiplying 10 throughout
10x+2x+5x=510
17x=510
x=510/17
Therefore x=30
Written as a power of ten is 256.×10^0 or 2.56×10^1
7.8+3.5(6.8)-1.5
7.8+23.8-1.5
31.6-1.5
30.1
Answer:
Step-by-step explanation:
