Given:
The quadratic equation is
To find:
The correct application of the quadratic formula.
Solution:
If a quadratic equation is 
, then the quadratic formula is
We have,
Putting 
, we get
Here, 
. Using the quadratic formula, we get
The correct application of the quadratic formula is .
Note: The options are not in proper format.
Answer:
210 I think
Step-by-step explanation:
2000 divided by 10 is 200
And the length was 10cm longer
It would be 210
I am not to sure, Please correct me if I am wrong.
3124 = 3000 + 100 + 20 + 4
Answer:
46 mph and 61 mph
Step-by-step explanation:
Distance=speed*time
Let speed of one bus be x and another x+15
After 3 hours
First bus would have traveled 3x while second bus 3(x+15)=3x+45
Total distance= 3x+3x+45=6x+45
6x+45=321
6x=321-45=276
x=276/6=46 mph
x+15=46+15=61 mph
Answer: The correct answer is the last choice.
In the first segment of the trip, the car goes from 0 to 2 hours and the line is moving up. Therefore, it traveled for 2 hours.
In the second segment, the line went straight horizontal for 1 hour. That means the distance didn't change, in other words it didn't move.
In the last segment, it moved up again for 2 hours.
