Hey there! :D
When you multiply powers, you add them.
You would only need to add 5 and 3 together.
5+3= 8

<=== the answer
I hope this helps!
~kaikers
Answer:
-0.5
Step-by-step explanation:
In the picture above.
I hope that it's a clear solution.
All you need to do is divide both sides by -7. Once you divide -56 by -7, you get 8. So k=8.
Hi
3*5000 +X*2500 = 25 000
15 000 + 2 500X = 25 000
2 500X = 25 000 - 15 000
2 500 X = 10 000
x = 10 000 / 2 500
X = 100/25
X = 4
You need 4 post for B
3*5000 + 4* 2 500 = 15 000 + 10 000 = 25 000