Write the following comparison as a ratio reduced to lowest terms. 128 hours to 6 days ( fraction form)​

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

X+y=-4 x-y=2 use elimination with adding and subtraction

Indicate the formula for the following conditions: p^c(n,r)=