Answer:
First option
Step-by-step explanation:

I believe the equation is wrong
Yes it can, but jost once
It’s, 4+x=12. Hope this helps☺️
Answer:
6
Step-by-step explanation:
maximum calories in a day = 540
no. of calories from the dog food = 320 x 1 
= 480
∴ she can have: 540 - 480
= 60 calories to stay inside calorie range
no. of new treats she can have = 60 ÷ 10
= 6
Hope this helps!