x*x=152
x2=152
Take square root.
x=±√152
x=√238
or
x=−√238
Answer:
c. 9t+45 that shows distributive property
where it shows a*(b+c)=(a*b)+(b*c).so,9(t+5)=9*t+9*5
Answer:
2,250,000 km
Step-by-step explanation:
From the above question our scale is given as:
1 m : 250000km
We are trying to find the distance between two villages which is 9m apart in kilometers
Hence
1 m : 250000km
= 1 m = 250000km
9m = x km
Cross Multiply
x km = 9 × 250,000km
x km = 2,250,000 km
Answer:
10 km/hr
Step-by-step explanation:
Average speed = Total distance travelled / Total time taken
Ardi:
Total distance travelled = 70 km
Total time taken = 35 minutes = 35/60 hour
Average speed = Total distance travelled / Total time taken
= 70 km ÷ 35/60 hr
= 70 × 60/35
= 4,200/35
= 120 km/hr
Lei:
Total distance travelled = 585 km Total time taken = 9:05 - 13:35 = 4 hours 30 minutes
= 4.5 hours
Average speed = Total distance travelled / Total time taken
= 585 km / 4.5 hours
= 130 km/hr
Difference, in km/h, between the average speed of their trains = Lei's train - Ardi's train
= 130 km/hr - 120 km/hr
= 10 km/hr
