Answer:
9
Step-by-step explanation:
let a = 2
b = 5
2a + b
Substituting the values,
=> 2(2) + 5
=> 4 + 5
=> 9
yes
As an example
(x₁, y₁ ) = (1,2) and (x₂, y₂ ) = (5,3), then
d = = = =
Now let (x₁, y₁ ) = (5,3) and (x₂, y₂ ) = (1,2), then
b. -2.5 × 10-4 is the answer