You would just do 4 x 7, which means there are 28 combinations.
Answer=5/16 or 0.3125 feet
Step-by-step explanation:
I think 2401...I just asked Siri
Answer:




Step-by-step explanation:
Given:


---
1st problem:


Distribute:

Combine like terms:

---
2nd problem:



Distribute -3 to first factor:
Use foil to simplify:

Replace
with -1:

Combine like terms:

---
3rd problem:


Distribute 2 to the second factor:


Use foil to simplify:

Replace
with -1:

Combine like terms:

----
4th problem:

Distribute:

Combine like terms:

Simplify:
