68-40=28
28/4=7
therefore, 7 is your answer
(Hope it helps my friend ^_^)
Answer:
The first car was traveling 70 mph, while the second was driving 50 mph.
Step-by-step explanation:
Set the cars as a proportion:
![\frac{210}{x + 2} = \frac{150}{x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B210%7D%7Bx%20%2B%202%7D%20%20%3D%20%20%5Cfrac%7B150%7D%7Bx%7D%20)
X represents the speed of the second car. By cross multiplying, you get the following equation:
![210x = 150(x + 20)](https://tex.z-dn.net/?f=210x%20%3D%20150%28x%20%2B%2020%29)
You solve by distributing 150 to get 210x = 150x + 3000.
Solving for x gets you 50.
That means the first car was going at 50 mph. Adding 20, you get 70 as the speed for the second car.
Answer: 7
Step-by-step explanation: 5 + 1 + 1 = 7 .
Answer:35
Step-by-step explanation:
Answer: A, C, and D
Step-by-step explanation:
A terminating decimal is a decimal that has an end. In other words,
is one, but
is not.
✓ A. 0.032
✗ B. 0.999...
✓ C. 0.525
✓ D. 0.75