1 yard = 3 feet
7 yard = 21 feet
21 + 2 = 23 feet
The correct answer is-2xy if it’s subtract
Answer:
where is the figure
Step-by-step explanation:
u should upload the figure too
Answer:

Step-by-step explanation:
First, note that

And using the chain rule in one variable

Now remember that the chain rule in several variables sates that

Therefore the chain rule in several variables would look like this.

3x+y=9 ....(1)
3x-5y=15. ......(2)
-[3x-5y=15]
=> 3x+ y = 9
-3x+5y=-15
..........................
0 +6y=-6
so,y=-1
3x+(-1)=9
3x=10
x=10/3