Answer:
10
Step-by-step explanation:
y=x+3; x=7
Substitute x in with 7
Add 7 and 3
Answer:
1. C
2. B
3. C
4. A
5. D
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
2xy+15x
Let x=4 and y= -9
2(-4)(-9) + 15(-4)
Multiply
72 -60
Subtract
12