eileenxmata eileenxmata
  • 12-02-2018
  • Mathematics
contestada

Find a ⋅ b.
a = <7, 4>, b = <3, 5>

a) 41
b) <10, 9>
c) -1
d) <21, 20>

Respuesta :

hisroyal1
hisroyal1 hisroyal1
  • 12-02-2018
The answer is 41 (Option A)


Expalanation

Given,
a = <7, 4>
b = <3, 5>

We are told to find a ⋅ b (which is a scaler product)


Taken that,

a = <x₁, y₁> 

b = <x₂, y₂>


a ⋅ b = x₁x₂ + y₁y₂

a ⋅ b = (7 * 3) + (4 * 5)

a ⋅ b = 21 + 20

a ⋅ b = 41 (OPTION A)

Answer Link

Otras preguntas

3 times the difference between 37.5 and 24.5
local governments can be based on what
Velocity describes the speed of an object in a particular direction.. Please select the best answer from the choices provided T F
Because the conditions for farming were good the first civilizations arose
McDonald's has sold more than a billion hamburgers. If it were possible to eat a hamburger every minute of every day without stopping, how many years would it t
What is the sea closest to Antarctica Called
Solve the inequality. Explain all steps and identify the properties used. 3a-4≤5
How does a frogs skeletal and muscular system work together
Who first proposed that Armistice Day be renamed Veterans Day? Dwight d. Eisenhower Alvin J. King Douglas MacArthur Harry S. Truman
Katty has 7 puppys and she gives 8 away her mom gave her 2 back how many does she have