15+n=-9 answer first and u will be the top one .

Step-by-step explanation:

15+n=-9

n=-9-15

n=-24

=-24

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

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: