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

Adding Fractions label the numerator and denominator 2/3+1/5=

Write the equation in logarithmic form n^(4/3)=m

2x^2-5x+6 divided by x-3

If the probability that it doesn't rain on a given day is .25, what is the probability that it doesn't rain 2 days in a row during a 5-day period? The answer is

Which facts could be applied to simplify this expression check all that apply 5x+3y+(-x)+6z

The difference between the Soviet Union and Great Britain in Europe after the war is which of the following? A. Great Britain did not want to control and of t

write down the 1st term in the sequence given by: T(n) = n² - 4

Help with this homework

Gabe has 4 birdcages. he keeps 5 birds in each cage. then gabe buys another birdcage. the new birdcage has the same number of birds. how many birds does gabe ha

the acceleration of a freely falling body is about 10m/sec/sec. if the ball is dropped from the top of a building what would its velocity be after 2 seconds?