2.161616 as fraction and as a mixed number
2 answers:
Answer:
x = , mixed fraction [tex]2\frac{16}{99}[/tex]
Step-by-step explanation:
Given : 2.161616
To find : write as fraction and a mixed number.
Solution : We have given that
2.161616
Let x =2.161616
We can see the number 16 is repeating 2.161616
So, the bar line is over the two digit 16
On multiplying the number both side by 100.
100x = 100 *2.161616
100x =216.1616
We can write the number 216.1616 in term of x
100x = 214 + x
On subtracting both sides by x
100x -x = 214
99x = 214
On dividing both sides by 99
x = .
x = .
Mixed fraction :
Therefore, x = , mixed fraction [tex]2\frac{16}{99}[/tex]
You might be interested in
Distance traveled in clear weather = 50 miles
Distance traveled in thunderstorm = 15 miles
Let speed in clear weather = x
⇒ Speed in thunderstorm = x-20
Total time taken for trip = 1.5 hours
We need to determine average speed in clear weather (i.e. x) and average speed in the thunderstorm (i.e. x-20 ).
Total time taken for trip = Time taken in clear weather + Time taken in thunderstorm
⇒ Total time taken for trip = +
⇒ 1.5 = +
⇒ 1.5 =
⇒ 15*x*(x-20) = 10*[50*(x-20)+15*x]
⇒ 15x² - 300x = 500x - 10,000 + 150x
⇒ 15x² - 300x = 650x - 10,000
⇒ 15x² - 950x + 10,000 = 0
⇒ 3x² - 190x + 2,000 = 0
The above equation is in the format of ax² + bx + c = 0
To determine the roots of the equation, we will first determine 'D'
D = b² - 4ac
⇒ D = (-190)² - 4*3*2,000
⇒ D = 36,100 - 24,000
⇒ D = 12,100
Now using the D to determine the two roots of the equation
Roots are: x₁ = ; x₂ =
⇒ x₁ = and x₂ =
⇒ x₁ = and x₂ =
⇒ x₁ = and x₂ =
⇒ x₁ = 50 and x₂ = 13.33
So speed in clear weather can be 50 mph or 13.33 mph. However, we know that in thunderstorm was 20 mph less than speed in clear weather.
If speed in clear weather is 13.33 mph then speed in thunderstorm would be negative, which is not possible since speed can't be negative.
Hence, the speed in clear weather would be 50 mph, and in thunderstorm would be 20 mph less, i.e. 30 mph.