Answer:
150 cm squared
Step-by-step explanation:
The answer I believe is c
The air force plane travelled for a total of 6.9 hours.
<u>SOLUTION:
</u>
Given, An Air Force plane left Nairobi and flew west at an average speed of 159 mph. A cargo plane left sometime later flying in the same direction at an average speed of 207 mph. After flying for 5.3 hours the cargo plane caught up with the Air Force plane.
We have to find the number of hours the Air Force plane flew before the cargo plane caught up.
Now, we know that, 
For air force plane 

Now, when cargo plane caught the air force plane the distance travelled by the planes will be equal.
So, 


Time taken by air force plane = 6.9 hrs
Answer:
A.
Step-by-step explanation:
The sum of angles of a triangle is 180. if you add 85+45+60 you get 190. That is more than 180.
If i were you, i would add one to 7x and fifteen. this gives you x^2+8x+16, a perfect square of x+4.