Rebecca and Virginia are at the amusement park. Virginia brought $9.98 less than Rebecca did to the park. Virginia brought $31.57 to the park.

Which equation can be used to find how much money Rebecca brought to the amusement park, r?
A.

B.

C.

D.

$31.57+$9.98=r

Step-by-step explanation:

You can think inverse operation with this equation. $9.98 less mean subtract and the inverse of subtract is add. $31.57 is a "neutral" value because it does not have any key math words with it. Therefore, you would add $9.98 to $31.57 in order to get r.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: