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.

The savings went from $450 to $420, this means that Geraldo lost $30

This change can be described by the difference between the both savings, this is:

final amount - initial amount = difference

$420 - $450 = -$30

Then the change can be described by the negative integer -$30, this number means that Geraldo "debt" or "lost" 30 dollars.

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

answer: 1722

step-by-step explanation:

given: the mass of saturn=

the mass of mercury=

the number of times the mass of saturn is greater than the mass of mercury

hence, the mass of saturn is 1722 times greater than the mass of mercury.