What is the speed of an object that travels 20 meters in 4 seconds ?

Step-by-step explanation:

Given that, an object moves 20 metre in 4 seconds.

So, distance (d1) = 20 m and time (t1) = 4 sec

Also given that, then object travels in 20 metre in 2 seconds.

Now, distance (d2) = 20 m and time (t2) = 2 sec

We have to find the average speed of the object.

Average speed = (Total distance)/(Total time)

Total distance travelled by an object = d1 + d2

= (20 + 20)m

= 40 m

Total time taken by an object = t1 + t2

= (4 + 2) sec

= 6 sec

Average speed = 40/6 = 6.67 m/s

Therefore, the average speed of the object is 6.67 m/s.

2500

step-by-step explanation:

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.