Answer: B ( 2,9) .
Step-by-step explanation:
when a = -5 and y = 7 :
Answer: -40
ok done. Thank to me :>
Answer:
x=10
y=2
1)add the equations and find what x is.
x-y=8
+x+y=12
—————
2x=20
— —
2 2
3)fill in x for the second equation.
x+y=12
since x=10,replace x with 10.
10+y=12.
subtract 19 from both sides.
10+y=12
-10 -10
—————-
huh?
their are 17 cows
7x2=14
82-14=68
68/4=17
