Can someone me with this ( -1) + (+8)

Step-by-step explanation:

(+)(+) = (+)

(-)(+) = (+)(-) = (-)

(-)(-) = (+)

(-1) + (+8)= (-1) + 8      use the commutative property a + b = b + a

= 8 + (-1) = 8 - 1 = 7

hope this .

r3t40