How many solutions does this system have? x-y=-4
3x+y=8
one
ООО
two
a
an infinite number
no solution

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

Which one ? is the answer and how to find this answer