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

Which of these terms is defined as the ability to cause motion or create change? A. efficiency B. energy C. force D. sound

Find an equation of the plane. The plane through the point (1, -1, - 1 ) and parallel to the plane 5x - y - z = 6

there are 2 circles and 4 triangles. What is the simplest ratio of circles to triangles?

Why do you think the Romans used natural boundaries as borders for their Empire?

2. What is the potato called that was genetically modified in 2015 that is resistant to the blight? I

due tomorrow please help me

There are three stable isotopes of magnesium. Their masses are 23.9850, 24.9858, and 25.9826 u. If the average atomic mass of magnesium is 24.3050 u and the nat

What did city states in sumer have in common? A. They shard the same laws B. They were centers of trade C. They were all riled by one king D. They were home to

what Reconstruction was.

Housing and entertalnment are both needs. True False