Answer:
1
Step-by-step explanation:
5m + 9n
5(-7) + 9(4)
-35 + 36
Plug in the numbers
Multiply
- 35 + 36
Solve.
36-35=1
a)7x-3x
b)4+28y
first one follow bidmas
2nd one just do 4 times 1 =4 and 7y times 4 equals 28y
Answer -5, -2, 1, 3
