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

Q: If 3x-6<12, then x could be? Answer choices: A:5 B:7 C:9 D:12

should English be declared as Americas national language? it has to be a few paragraphs with examples please

Which is the equation of the trend line that can be generated by using the data from year 1 and 5?

Which of the following transitions would be used to show a relationship? Next To begin with In light of those things As an afterthought

help? everything is on hereABCor D?

Identify the function for this situation.

The map shows Santa Cruz Boulevard and the construction site for the new town hall. Find the equation of a “street” that passes through the building site and is

The graph below represents which system of inequalities? graph of two infinite lines that intersect at a point. One line is solid and goes through the points 0

A circular pond is to be surrounded by a gravel path. Use the diagram to find the square feet of gravel needed if we know the pond has a radius of 200 ft and th

Most head restraints need to be _______, to support the head. A. Adjusted downward B. Adjected upward