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

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

If you want to increase the gravitational force between two objects; would you rather double the mass of one object or halve the distance between them? Select

What common misconceptions about paying taxes exist? Check all that apply. U A person who is unable to pay taxes does not have to pay them. A person who chooses

Which of the following is NOT a data type in Python?

The hypotenuse of a right triangle is 15 cm, and the shorter leg is 9 cm. Find the length of the other leg. a. 2 cmb. 5 cmc. 12 cm d. 3 cm

covert 12 into a percent of 100

What can be said about the shape of the infrared stretch of the o-h functional group in a carboxylic acid.?

In which paragraph does the writer place the climax of the story?

Any use of classical or operant conditioning to directly alter human behavior is called:

a space shuttle propels gas particles out the back of the shuttle and is able to travel forward through space is an example of which newton law.

As a freely falling object picks up downward speed, what happens to the power supplied by the gravitational force? (1) The power stays the same. (2) Unable to