504÷1800=0.28
28% of her income goes to her rent
Answer:

Step-by-step explanation:
2)
a) elimination method
b) substitution method
c) substitution method
For the first part we can elimate the y variable by subtracting the equations. We can then find the value of x.
For the second part we can substitute y as 2x+5 in the second equation and solve for x.
For the third part we can substitute y as 4x+3 in the first equation and solve for x.
3)

Answer:
-4 1/2 or -4.5 or -9/2
Step-by-step explanation:
She will need to buy 3 more cookies because 2 dozens is 24. And 16 cookies plus 5 is 21 cookies plus 3 is a dozen cookies which is 24
24=16 chocolate cookies+5 peanut cookies+3 random cookies