Answer:
y=x+5
Step-by-step explanation:
Answer:
C. 
Step-by-step explanation:
Lets plug in -2 into each of these equation to see which one gives us the solution of -6
A. 

B. 

C. 

D. 

As we can see, function C was the only one that gave us the value of -6, so that is our answer.
Answer:
22
Step-by-step explanation:
The answer is 5905.................
Answer:
ab + bc + ca = 40
Step-by-step explanation:
Using the expansion identity
(a + b + c)² = a² + b² + c² + 2(ab + bc + ca) , that is
9² = 1 + 2(ab + bc + ca)
81 = 1 + 2(ab + bc + ca) ← subtract 1 from both sides
80 = 2(ab + bc + ca) ← divide both sides by 2
40 = ab + bc + ca