If a train travels at 80 mph for 30 min, what is the distance traveled?

The train travels 40 m

Step-by-step explanation:

* Lets explain how to solve the problem

- The distance = speed × time

- The train travels 80 mph for 30 minutes

∵ The train travels at speed 80 mph

∵ The train travels for 30 minutes

- We must change the minutes to hours

- There are 60 minutes in an hour

∵ 1 hour = 60 minutes

∴ 1 minute = 1/60 hour

∵ The train traveled for 30 minutes

∴ The train traveled for = 30 × 1/60 = 1/2 hour

∵ Distance = speed × time

∵ The speed = 80 mph

∵ The time = 1/2 h

∴ The distance = 80 × 1/2 = 40 m

* The train travels 40 m

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -