3(3x-1)^2=21
(3x-1)^2 = 7
3x-1 = square root of 7
3x = square root of 7 - 1
x = (square root of 7 - 1)/3
The average speed of the student for his entire walk is equal to 1.5 m/s. Therefore, option (b) is correct.
What is the average speed?
The average speed of a body is calculated as the total distance traveled in a fixed interval of time. The average speed can be determined by dividing the total distance traveled by a body by the total time.
The average velocity is a single value if the object moves uniformly. Speed is a scalar quantity, it has no specified direction. The average speed has the S.I. unit the same as velocity i.e. m/s.
Given the distance covered by a student in first 80 sec = 100m
After stooping for 30sec again cover a distance of 200m in 90sec.
The total distance traveled by the student = 100 + 200 = 300m
The time taken by student to cover distance = 80 + 30 +90 = 200 sec
The average speed of the student = total distance/ total time taken
= 300/200 = 1.5 m/s
Therefore, the average speed of the student is equal to 1.5m/s.
Learn more about average speed, here:
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<span>Answer:
(x + 4)/(x^2 - 3x - 10) * (x - 3)/(x^2 + x - 12)
= (x - 3)(x + 4) / (x + 2)(x - 5)(x + 4)(x - 3)
= 1/(x + 2)(x - 5)</span>
Number 4 is the correct answer
Here, we know: 1 quart = 32 fluid ounces
So, 55 quart = 32 × 55 = 1760
In short, Your Answer would be 1760 Ounces
Hope this helps!
