D. When you substitute for the variables the equation becomes -1-5×6=-31. First, you multiply -5 by 6 to get -30. This makes the equation -1-30=-31. -1-30 is -31 so your equation is now -31=-31.

6 0

3 years ago

Mai runs around a 400-meter track at a constant speed of 250 meters per minute. How many minutes does it take Mai to complete 4

Artyom0805 [142]

Answer:

$6.4$ minutes

Step-by-step explanation:

<u>Given information:</u>

- Track is 400m long

- Mai runs at a constant speed of 250 meters/minute

- - - - - -

To find how many minutes it takes for Mai to complete 4 laps, we need to find the total distance Mai is running for:

$400\times4=1600$ meters

To find how many minutes Mai is running for, we divide by the distance Mai travels per minute:

$1600\div250=6.4$ minutes

∴ Mai takes $6.4$ minutes to run 4 laps around the track.

Hope this helps :)

8 0

3 years ago