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

It is important to avoid isostatic stretches because they can

The right-handed twin accused his brother of murdering their mother, and their quarrels continued until it was time to bury their mother. With the help of their

A number, y, is equal to twice the sum of a smaller number and 3. The larger number is also equal to 5 more than 3 times the smaller number. Which equations rep

An undefined term can ____be used in a theorem. always, sometimes, never

The best way to destroy harmful germs that may be present in meat is to:

I need help with this question

Article I, Section 9 states, among other things, that Congress may establish the rules of naturalization.trueorfalse

Identify the dependent variable in the statement: the speed you walk and the time it takes to complete your mile walk

x - 3y = -3 x + 3y = 9

Which country's wartime military included women in frontline combat roles and in air defense units?