The value of a would be 3.5, as a=1 when b=10 means that a is worth 1/10 of b's value.
Answer:

Step-by-step explanation:
(
)
Multiply
by each term in the parentheses.
+ 
Now, all you have to do is simplify.

Answer:
ac=-3, BC=57 I hope it will help you please follow me
Answer:
-26 is the y-intercept
Step-by-step explanation:
since you already have the slope solved, you just have to plug in one of the two coordinate pairs. i plugged it (4,6) since it didnt have any negatives to work with. 6 should be where y is and 4 is x. you now should solve it as a normal equation. it gave me -26.