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

The table shows information about water used in a household. The value for April is missing. The mean monthly water used for the six months is 18 m Work out the

Which part of this model represents a layer made of liquid rock that produces a magnetic field? A. B B. A C. D D. C

True or false, The atomic number of an element is a whole number that decreases as you read across each row of the periodic table from left to right.

hi everybody how's your day can we be friends

Help and explain pls and thankyouuu

Take a moment to reflect on the various choices you made in the simulation and their outcomes. In 5-8 sentences, discuss how both individual and societal factor

What colors do you mix to make yellow

suppose △abc≅△xyz. what is the corresponding congruent part for each segment or angle?

Write an equation that represents the line.

which of the following is saturated hydrocarbon?1 alkyne2 alkane3 ethylene4 alkene