ttmarkstt ttmarkstt

04-03-2018
Mathematics

contestada

Find a ⋅ b.

a = 7i - 4j, b = 4i + 3j

A) <28, -12>
B) 16
C) -40
D) <11, -1>

Respuesta :

sqdancefan sqdancefan

11-12-2018

Answer:

B) 16

Step-by-step explanation:

The dot product of a pair of vectors is the sum of the products of their corresponding parts. It is a scalar.

... a · b = (7i -4j) · (4i +3j) = 7·4 + (-4)·3

... = 28 -12 = 16

Answer Link

Otras preguntas

what is the volume of a block with dimensions 2.56cm x 4.652 cm x 8.70 cm ??

The study of the natural processes that occur in the environment on humans affect them is called

Glaciers pick up large rocks and carry them away. This is called _____.

The epidermal tissue of a plant prevents _________.

how are solutions and compounds similar

I need help with part 15 b. Thank you

AC, DF, and GI are parallel. Use the figure to complete the proportion.BEADJBBC

Please Answer these following questions...1. What is (-7)^5 in expanded form2. Solve 2s^3 - 4r^2 if r = 1 and s = 5 (explain all steps)3. How would you convince

In the state of Georgia, a juvenile who is 13 years of age can be tried as an adult if he or she...

you want to describe the harmonic motion of a swing. You find out that it take 2 seconds for the swing to complete one cycle. What is the swing's period and fre