Answer:
, 
Step-by-step explanation:
<h3>
I will use the elimination method.</h3>
We want to make the X's the same:


Because the signs of the X's are the same we subtract the 2 equations to make:
(I put the second one on top of the 1st)

So:

Substitute y into either equation 1 or 2:
(I chose equation 1)



So:

Answer:
d=4.5
Step-by-step explanation:
d+5.5=10
d=10-5.5
d=4.5
Hope this is helpful
Answer:
b or c I'm not for sure
Step-by-step explanation:
hope this helps