The cumcutative property of addition
Answer:
Step-by-step explanation:
c=cookies
b=brownies
2c+3b=9.50 > Briana
10c+6b=20.50 > Nevaeh
By adding 74,68,87,92,96,47,26,87 which gives you 577 and divide by 8 equals 72.1 hope that helps
Y= -2x-5
Work:
8x+4y=-20
4y=-20-8x
y= -2x-5