Answer:
The dot product of (7,5) and (-5,4) is -15
Step-by-step explanation:
Given
(7,5) and (-5,4)
Required
Determine the dot product
Dot product is calculated using the following formula;
[tex]a.b = {a_1b_1+a_2b_2+...+a_nb_n}[/tex]
Let a = (7,5) and b = (-5,4);
The above formula becomes
[tex]a.b = {7*-5+5*4}[/tex]
[tex]a.b = {-35+20}[/tex]
[tex]a.b = {-15}[/tex]
Hence, the dot product of (7,5) and (-5,4) is -15
