I googled how to do markup 50%... and it took me awhile but I think I got the answer, $2.66 + $1.33 (into $1.33 from 2.66 x0.5) and u get $3.99
Sorry If I'm wrong but I hoped I helped!
Answer:
456.9
Step-by-step explanation:
Numbers are 4 and 8
<u>Step-by-step explanation:</u>
Step 1:
Let the numbers be x and y. Given that their sum is 12 and difference is 4. Form equations for this data.
⇒ x + y = 12 ------ (1)
⇒ x - y = 4 -------- (2)
Subtract eq (2) from (1)
⇒ 2x = 8
⇒ x = 4
Step 2:
Find y.
⇒ y = 12 - x = 12 - 4 = 8
0 because when x is 6 y is on the bottom of the x axis or at 0
Using the relation between velocity, distance and time, it is found that he traveled 281.25 km by bus and 1618.75 km by plane.
<h3>What is the
relation between velocity, distance and time?</h3>
Velocity is distance divided by time, that is:
![v = \frac{d}{t}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7Bd%7D%7Bt%7D)
In this problem, first he traveled a distance of d km by bus, with an average speed of 60 km/h and a time of t, hence:
![60 = \frac{d}{t}](https://tex.z-dn.net/?f=60%20%3D%20%5Cfrac%7Bd%7D%7Bt%7D)
![d = 60t](https://tex.z-dn.net/?f=d%20%3D%2060t)
Then, by plane, he traveled a distance of 1900 - d km, with an average speed of 700 km/h and a time of 7 - t, hence:
![700 = \frac{1900 - d}{7 - t}](https://tex.z-dn.net/?f=700%20%3D%20%5Cfrac%7B1900%20-%20d%7D%7B7%20-%20t%7D)
Since d = 60t, we have that:
![700 = \frac{1900 - 60t}{7 - t}](https://tex.z-dn.net/?f=700%20%3D%20%5Cfrac%7B1900%20-%2060t%7D%7B7%20-%20t%7D)
![1900 - 60t = 4900 - 700t](https://tex.z-dn.net/?f=1900%20-%2060t%20%3D%204900%20-%20700t)
![640t = 3000](https://tex.z-dn.net/?f=640t%20%3D%203000)
![t = \frac{3000}{640}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B3000%7D%7B640%7D)
![t = 4.6875](https://tex.z-dn.net/?f=t%20%3D%204.6875)
Hence:
d = 60t = 60 x 4.6875 = 281.25 km
1900 - d = 1900 - 281.25 = 1618.75 km
He traveled 281.25 km by bus and 1618.75 km by plane.
More can be learned about the relation between velocity, distance and time at brainly.com/question/24316569