Answer:
The expression is 
Jake has in his wallet 
Step-by-step explanation:
Let
x-----> the money that Jake has in his wallet
we know that
The expression that represent the situation is equal to
1) Jake has $100 of birthday money in his wallet
so

2) He spends $15 at Twistee Treat and $10 at Wawa
so

3) He finds a $20 bill on the ground
so

3) His friend borrows $40 from Jake
so

4) At home, Jake mows the lawn and earns $35
so


Answer:
It is undefined
Step-by-step explanation:
Slope formula:
m = y₂ - y₁ / x₂ - x₁
m = 2 - 6 / 3 - 3
m = -4 / 0
m = 0
From this calculation, there is no slope because the two points have the same x variable, which will result to a no run.
It would be a vertical line.
Well the slope formula is y² - y¹ / x² - x¹.
If there was a picture I could help!
20 possibilities based on this as a combination not a permutation, 6 nCr 3 = 20
400 should be the answer. Hope this helps!