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

Many radioactive atoms that have large masses undergo radioactive decay by releasing a particle that is identical to a helium-4 nucleus What changes in the ori

Match the effects on the concentration of SO3 gas when the following changes occur after initial equilibrium has been established in this system (N.C. = no chan

Why did Marcus gravey's movement fall apart ?

Whats the answer for 8x+4(4x-3)=4(6x+4)-4

the radius of a music CD is 6 centimeters. what is the circumfrence of a CD to the nearest tenth? use 3.14 for. pi

What are 2 examples of body fluids that help the immune system.

Find the missing angles, please show how you did it! (the line from 53 degree through c and 114 is not straight)

The two rules within Title II of hippa that have the greatest relevance and impact on the business associates are

Your friend gets to school wearing an outfit straight from the pages of a recent fashion magazine. He says he is dressing like the famous actors in the magazine

You discover you can deduct medical expenses over 6% of your income. Your income is $42,000 and you had medical expenses of $567. What portion of your medical e