Answer:
<em>The train must travel at 50 km/hr to make it on time.</em>
<em></em>
Step-by-step explanation:
distance to be covered = 55 km
time to cover this distance = 1 hr 20 min
1 hr 20 min = 1.33 hrs (20 min = 20/60 hrs = 0.33 hrs)
The train travels the first 30 km distance at a speed of 36 km/hr
and we know that time taken = distance/speed
therefore the time taken to run this 30 km will be
time = 30/36 = 0.83 hr
The train still has 55 - 30 = 25 km to cover,
and the time left is 1.33 - 0.83 = 0.5 hrs left
to make it on time, the train must travel at
speed = distance/time = 25/0.5 = <em>50 km/hr</em>
Greatest Common Factor - GCF
Factors of 24: 1; 2; 3; 4; 6; 8; 12; 24
Factors of 60: 1; 2; 3; 4; 5; 6; 10; 12; 15; 20; 30; 60
Factors of 72: 1; 2; 3; 4; 6; 8; 9; 12; 18; 23; 24; 36; 72
<span>GCF(24; 60; 72) = 12
</span>other method
24|2 60|2 72|2
12|2 30|2 36|2
6|2 15|3 18|2
3|3 5|5 9|3
1| 1| 3|3
1|
GCF(24; 60; 72) = 2 · 2 · 3 = 12
Answer: The correct answer is $ 3.50 per pound. If she buys 4 1/4 pound, we convert the 1/4 to the decimal 0.25. Take the total cost of $14.88 and divide it by 4.25, the amount of watermelon she bought and it equals $3.50 per pound.
14.88/4.25= 3.50
Step-by-step explanation:
For this case we have the following system of equations:
We multiply the first equation by -4:
We have the following equivalent system of equations:
We add the equations:
We find the value of the variable "x":
Thus, the solution of the system is:
See the graphic in the attached image
ANswer:
See the graphic in the attached image
