Answer:
=9 * 1000 / 3600
=9000 / 3600
=2.5m/s
note that 1000m makes 1km and 3600seconds make an hour
Step-by-step explanation:
Answer:
18:19
Step-by-step explanation:
Given that,
The radius of circle A = 9 cm
The diameter of circle B = 19 cm
We know that,
Radius = diameter/2
The radius of circle B = 19/2 cm
The circumference of circle A is :
....(1)
And that of circle B is :
....(2)
Dividing equation (1) and (2) :

Hence, the ratio of circumferences of Circle A and Circle B is 18:19.
Given the coordinates of the vertices of a polygon (−2, −2) , (−2, 3) , (2, 4) , (3, 1) , and (0,−2), the perimeter of the polygon is 18. It is the sum of the length of five sides.
Answer:
Step-by-step explanation:
Sum = 4
Product = -60
Factors = 10 , -6
a² + 4a - 60 = <u>a² + 10a</u> - 6a + (-6) * 10
=a(a + 10) - 6(a +10)
= (a +10) (a -6 )