10,
9. 0
22
essential question check-in
11. the amount of money in geraldo's savings account went from $450 to
$420. explain how to use a negative integer to describe the change.
10
unit 1

You apply a negative sign(-) infront of the change.

Step-by-step explanation:

it would be -30$

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m