Answer:
190 miles
Step-by-step explanation:
I believe its 190 miles.
So, he drove 55 miles per hour the first 3 hours:
3 * 55 = 165 miles
Then an adittional 1/2 hour at 50 miles an hour:
50/2 = 25 miles.
So, in total:
165 + 25 = 190 miles
Answer:
The Humming bee need to eat 0.0028 ounces of food each day.
Step-by-step explanation:
Given:
Weight of the humming bee = 0.0056 ounces
We need to find amount of food humming bee should eat each day to survive.
Solution:
Now given that:
They have to eat half their body weight every day to survive.
So we can say that;
Amount of food humming bee needs to eat is half of the weight of the humming bee.
framing in equation form we get;
Amount of food humming bee needs to eat =
Hence The Humming bee need to eat 0.0028 ounces of food each day.
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Let the number be (10 x + y)
Then, 10 x + y = 3 * (x + y) (given)
Or, 10 x + y = 3 x + 3 y
Or, 10 x - 3 x = 3 y - y
Or, 7x = 2 y
Or, x = 2 y / 7 ( Eq. 1)
Also, 10 x + y + 45 = 10 y + x ( given)
Or, 10 x - x = 10 y - y - 45
Or, 9 x = 9 y - 45 ( Eq. 2)
Substituting the value of x from (Eq. 1) in (Eq. 2), we have:
9 * 2 y / 7 = 9 y - 45
Or, (9 y ) - (18 y / 7) = 45
Or, 63 y - 18 y = 315
Or, 45 y = 315
Or, y = 7
From (Eq. 1),
x = 2 * 7 / 7 = 2
So, the number is 10 x + y = (10 * 2) + 7 = (20 + 7) = 27
Answer
Check:
Sum of the digits = 2 + 7 = 9
9 * 3 = 27 ✓
Adding 45 to the number 27, we get 72. So, the digits get reversed.