Skip to main content

High School Math Algebra Pre-Algebra Student Edition

the given expression

the given expression

Pre-Algebra Student Edition

Pre-Algebra Student Edition

1st Edition

ISBN: 9780078957734

Author: Glencoe/McGraw-Hill

Publisher: MCG

See similar textbooks

Concept explainers

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.

Videos

Question

Chapter 1.2, Problem 32PPS

To determine

To evaluate: the given expression

Expert Solution & Answer

Answer to Problem 32PPS

The numerical value of the given expression is 71

Explanation of Solution

Given:

x = 9, y = 4, and z = 12.

7z−(y+x)

Calculation:

Replace x with 9, y with 4 and z with 12

7z−(y+x)=7⋅12−(4+9)

Evaluate (4+9) first

=7⋅12−13

Here, 7⋅12 Means 7×12

=84−13 Subtract13 from 84

=71

Conclusion:

Thus, the numerical value of the given expression is 71

Chapter 1.2, Problem 31PPS

Chapter 1.2, Problem 33PPS

Chapter 1 Solutions

Pre-Algebra Student Edition

Ch. 1.1 - Prob. 1AGP Ch. 1.1 - Prob. 1BGP Ch. 1.1 - Prob. 2AGP Ch. 1.1 - Prob. 2BGP Ch. 1.1 - Prob. 2CGP Ch. 1.1 - Prob. 2DGP Ch. 1.1 - Prob. 3GP Ch. 1.1 - Prob. 1CYU Ch. 1.1 - Prob. 2CYU Ch. 1.1 - Prob. 3CYU

Ch. 1.1 - Prob. 4CYU Ch. 1.1 - Prob. 5CYU Ch. 1.1 - Prob. 6CYU Ch. 1.1 - Prob. 7CYU Ch. 1.1 - Prob. 8CYU Ch. 1.1 - Prob. 9CYU Ch. 1.1 - Prob. 10CYU Ch. 1.1 - Prob. 11CYU Ch. 1.1 - Prob. 12PPS Ch. 1.1 - Prob. 13PPS Ch. 1.1 - Prob. 14PPS Ch. 1.1 - Prob. 15PPS Ch. 1.1 - Prob. 16PPS Ch. 1.1 - Prob. 17PPS Ch. 1.1 - Prob. 18PPS Ch. 1.1 - Prob. 19PPS Ch. 1.1 - Prob. 20PPS Ch. 1.1 - Prob. 21PPS Ch. 1.1 - Prob. 22PPS Ch. 1.1 - Prob. 23PPS Ch. 1.1 - Prob. 24PPS Ch. 1.1 - Prob. 25PPS Ch. 1.1 - Prob. 26PPS Ch. 1.1 - Prob. 27PPS Ch. 1.1 - Prob. 28PPS Ch. 1.1 - Prob. 29PPS Ch. 1.1 - Prob. 30PPS Ch. 1.1 - Prob. 31PPS Ch. 1.1 - Prob. 32PPS Ch. 1.1 - Prob. 33PPS Ch. 1.1 - Prob. 34HP Ch. 1.1 - Prob. 35HP Ch. 1.1 - Prob. 36HP Ch. 1.1 - Prob. 37HP Ch. 1.1 - Prob. 38HP Ch. 1.1 - Prob. 39STP Ch. 1.1 - Prob. 40STP Ch. 1.1 - Prob. 41STP Ch. 1.1 - Prob. 42STP Ch. 1.2 - Prob. 1AGP Ch. 1.2 - Prob. 1BGP Ch. 1.2 - Prob. 2AGP Ch. 1.2 - Prob. 2BGP Ch. 1.2 - Prob. 3AGP Ch. 1.2 - Prob. 3BGP Ch. 1.2 - Prob. 3CGP Ch. 1.2 - Prob. 4GP Ch. 1.2 - Prob. 1CYU Ch. 1.2 - Prob. 2CYU Ch. 1.2 - Prob. 3CYU Ch. 1.2 - Prob. 4CYU Ch. 1.2 - Prob. 5CYU Ch. 1.2 - Prob. 6CYU Ch. 1.2 - Prob. 7CYU Ch. 1.2 - Prob. 8CYU Ch. 1.2 - Prob. 9CYU Ch. 1.2 - Prob. 10CYU Ch. 1.2 - Prob. 11CYU Ch. 1.2 - Prob. 12PPS Ch. 1.2 - Prob. 13PPS Ch. 1.2 - Prob. 14PPS Ch. 1.2 - Prob. 15PPS Ch. 1.2 - Prob. 16PPS Ch. 1.2 - Prob. 17PPS Ch. 1.2 - Prob. 18PPS Ch. 1.2 - Prob. 19PPS Ch. 1.2 - Prob. 20PPS Ch. 1.2 - Prob. 21PPS Ch. 1.2 - Prob. 22PPS Ch. 1.2 - Prob. 23PPS Ch. 1.2 - Prob. 24PPS Ch. 1.2 - Prob. 25PPS Ch. 1.2 - Prob. 26PPS Ch. 1.2 - Prob. 27PPS Ch. 1.2 - Prob. 28PPS Ch. 1.2 - Prob. 29PPS Ch. 1.2 - Prob. 30PPS Ch. 1.2 - Prob. 31PPS Ch. 1.2 - Prob. 32PPS Ch. 1.2 - Prob. 33PPS Ch. 1.2 - Prob. 34PPS Ch. 1.2 - Prob. 35PPS Ch. 1.2 - Prob. 36PPS Ch. 1.2 - Prob. 37PPS Ch. 1.2 - Prob. 38PPS Ch. 1.2 - Prob. 39PPS Ch. 1.2 - Prob. 40HP Ch. 1.2 - Prob. 41HP Ch. 1.2 - Prob. 42HP Ch. 1.2 - Prob. 43HP Ch. 1.2 - Prob. 44HP Ch. 1.2 - Prob. 45STP Ch. 1.2 - Prob. 46STP Ch. 1.2 - Prob. 47STP Ch. 1.2 - Prob. 48STP Ch. 1.2 - Prob. 49SR Ch. 1.2 - Prob. 50SR Ch. 1.2 - Prob. 51SR Ch. 1.2 - Prob. 52SR Ch. 1.2 - Prob. 53SR Ch. 1.2 - Prob. 54SR Ch. 1.2 - Prob. 55SR Ch. 1.2 - Prob. 56SR Ch. 1.2 - Prob. 57SR Ch. 1.2 - Prob. 58SR Ch. 1.2 - Prob. 59SR Ch. 1.2 - Prob. 60SR Ch. 1.2 - Prob. 61S Ch. 1.2 - Prob. 62S Ch. 1.2 - Prob. 63S Ch. 1.2 - Prob. 64S Ch. 1.3 - Prob. 1GP Ch. 1.3 - Prob. 2AGP Ch. 1.3 - Prob. 2BGP Ch. 1.3 - Prob. 2CGP Ch. 1.3 - Prob. 2DGP Ch. 1.3 - Prob. 3AGP Ch. 1.3 - Prob. 3BGP Ch. 1.3 - Prob. 4GP Ch. 1.3 - Prob. 1CYU Ch. 1.3 - Prob. 2CYU Ch. 1.3 - Prob. 3CYU Ch. 1.3 - Prob. 4CYU Ch. 1.3 - Prob. 5CYU Ch. 1.3 - Prob. 6CYU Ch. 1.3 - Prob. 7CYU Ch. 1.3 - Prob. 8CYU Ch. 1.3 - Prob. 9CYU Ch. 1.3 - Prob. 10CYU Ch. 1.3 - Prob. 11CYU Ch. 1.3 - Prob. 12CYU Ch. 1.3 - Prob. 13CYU Ch. 1.3 - Prob. 14CYU Ch. 1.3 - Prob. 15PPS Ch. 1.3 - Prob. 16PPS Ch. 1.3 - Prob. 17PPS Ch. 1.3 - Prob. 18PPS Ch. 1.3 - Prob. 19PPS Ch. 1.3 - Prob. 20PPS Ch. 1.3 - Prob. 21PPS Ch. 1.3 - Prob. 22PPS Ch. 1.3 - Prob. 23PPS Ch. 1.3 - Prob. 24PPS Ch. 1.3 - Prob. 25PPS Ch. 1.3 - Prob. 26PPS Ch. 1.3 - Prob. 27PPS Ch. 1.3 - Prob. 28PPS Ch. 1.3 - Prob. 29PPS Ch. 1.3 - Prob. 30PPS Ch. 1.3 - Prob. 31PPS Ch. 1.3 - Prob. 32PPS Ch. 1.3 - Prob. 33PPS Ch. 1.3 - Prob. 34PPS Ch. 1.3 - Prob. 35PPS Ch. 1.3 - Prob. 36PPS Ch. 1.3 - Prob. 37PPS Ch. 1.3 - Prob. 38PPS Ch. 1.3 - Prob. 39PPS Ch. 1.3 - Prob. 40PPS Ch. 1.3 - Prob. 41PPS Ch. 1.3 - Prob. 42PPS Ch. 1.3 - Prob. 43PPS Ch. 1.3 - Prob. 44HP Ch. 1.3 - Prob. 45HP Ch. 1.3 - Prob. 46HP Ch. 1.3 - Prob. 47HP Ch. 1.3 - Prob. 48HP Ch. 1.3 - Prob. 49STP Ch. 1.3 - Prob. 50STP Ch. 1.3 - Prob. 51STP Ch. 1.3 - Prob. 52STP Ch. 1.3 - Prob. 53SR Ch. 1.3 - Prob. 54SR Ch. 1.3 - Prob. 55SR Ch. 1.3 - Prob. 56SR Ch. 1.3 - Prob. 57SR Ch. 1.3 - Prob. 58SR Ch. 1.3 - Prob. 59SR Ch. 1.3 - Prob. 60SR Ch. 1.3 - Prob. 61SR Ch. 1.3 - Prob. 62SR Ch. 1.3 - Prob. 63SR Ch. 1.3 - Prob. 64S Ch. 1.3 - Prob. 65S Ch. 1.3 - Prob. 66S Ch. 1.3 - Prob. 67S Ch. 1.3 - Prob. 68S Ch. 1.3 - Prob. 69S Ch. 1.3 - Prob. 70S Ch. 1.3 - Prob. 71S Ch. 1.4 - Prob. 1AGP Ch. 1.4 - Prob. 1BGP Ch. 1.4 - Prob. 1CGP Ch. 1.4 - Prob. 1DGP Ch. 1.4 - Prob. 2AGP Ch. 1.4 - Prob. 2BGP Ch. 1.4 - Prob. 3GP Ch. 1.4 - Prob. 4AGP Ch. 1.4 - Prob. 4BGP Ch. 1.4 - Prob. 1CYU Ch. 1.4 - Prob. 2CYU Ch. 1.4 - Prob. 3CYU Ch. 1.4 - Prob. 4CYU Ch. 1.4 - Prob. 5CYU Ch. 1.4 - Prob. 6CYU Ch. 1.4 - Prob. 7CYU Ch. 1.4 - Prob. 8CYU Ch. 1.4 - Prob. 9CYU Ch. 1.4 - Prob. 10CYU Ch. 1.4 - Prob. 11CYU Ch. 1.4 - Prob. 12PPS Ch. 1.4 - Prob. 13PPS Ch. 1.4 - Prob. 14PPS Ch. 1.4 - Prob. 15PPS Ch. 1.4 - Prob. 16PPS Ch. 1.4 - Prob. 17PPS Ch. 1.4 - Prob. 18PPS Ch. 1.4 - Prob. 19PPS Ch. 1.4 - Prob. 20PPS Ch. 1.4 - Prob. 21PPS Ch. 1.4 - Prob. 22PPS Ch. 1.4 - Prob. 23PPS Ch. 1.4 - Prob. 24PPS Ch. 1.4 - Prob. 25PPS Ch. 1.4 - Prob. 26PPS Ch. 1.4 - Prob. 27PPS Ch. 1.4 - Prob. 28PPS Ch. 1.4 - Prob. 29PPS Ch. 1.4 - Prob. 30PPS Ch. 1.4 - Prob. 31PPS Ch. 1.4 - Prob. 32PPS Ch. 1.4 - Prob. 33PPS Ch. 1.4 - Prob. 34PPS Ch. 1.4 - Prob. 35PPS Ch. 1.4 - Prob. 36HP Ch. 1.4 - Prob. 37HP Ch. 1.4 - Prob. 38HP Ch. 1.4 - Prob. 39HP Ch. 1.4 - Prob. 40HP Ch. 1.4 - Prob. 41STP Ch. 1.4 - Prob. 42STP Ch. 1.4 - Prob. 43STP Ch. 1.4 - Prob. 44STP Ch. 1.4 - Prob. 45SR Ch. 1.4 - Prob. 46SR Ch. 1.4 - Prob. 47SR Ch. 1.4 - Prob. 48SR Ch. 1.4 - Prob. 49SR Ch. 1.4 - Prob. 50SR Ch. 1.4 - Prob. 51SR Ch. 1.4 - Prob. 52S Ch. 1.4 - Prob. 53S Ch. 1.4 - Prob. 54S Ch. 1.4 - Prob. 55S Ch. 1.4 - Prob. 56S Ch. 1.4 - Prob. 57S Ch. 1.5 - Prob. 1GP Ch. 1.5 - Prob. 2AGP Ch. 1.5 - Prob. 2BGP Ch. 1.5 - Prob. 1CYU Ch. 1.5 - Prob. 2CYU Ch. 1.5 - Prob. 3CYU Ch. 1.5 - Prob. 4PPS Ch. 1.5 - Prob. 5PPS Ch. 1.5 - Prob. 6PPS Ch. 1.5 - Prob. 7PPS Ch. 1.5 - Prob. 8PPS Ch. 1.5 - Prob. 9PPS Ch. 1.5 - Prob. 10PPS Ch. 1.5 - Prob. 11PPS Ch. 1.5 - Prob. 12HP Ch. 1.5 - Prob. 13HP Ch. 1.5 - Prob. 14HP Ch. 1.5 - Prob. 15STP Ch. 1.5 - Prob. 16STP Ch. 1.5 - Prob. 17STP Ch. 1.5 - Prob. 18STP Ch. 1.5 - Prob. 19SR Ch. 1.5 - Prob. 20SR Ch. 1.5 - Prob. 21SR Ch. 1.5 - Prob. 22SR Ch. 1.5 - Prob. 23SR Ch. 1.5 - Prob. 24SR Ch. 1.5 - Prob. 25SR Ch. 1.5 - Prob. 26SR Ch. 1.5 - Prob. 27SR Ch. 1.5 - Prob. 28SR Ch. 1.5 - Prob. 29SR Ch. 1.5 - Prob. 30SR Ch. 1.5 - Prob. 31SR Ch. 1.5 - Prob. 32S Ch. 1.5 - Prob. 33S Ch. 1.5 - Prob. 34S Ch. 1.5 - Prob. 35S Ch. 1.6 - Prob. 1GP Ch. 1.6 - Prob. 2GP Ch. 1.6 - Prob. 3AGP Ch. 1.6 - Prob. 3BGP Ch. 1.6 - Prob. 3CGP Ch. 1.6 - Prob. 1CYU Ch. 1.6 - Prob. 2PPS Ch. 1.6 - Prob. 3PPS Ch. 1.6 - Prob. 4PPS Ch. 1.6 - Prob. 5PPS Ch. 1.6 - Prob. 6PPS Ch. 1.6 - Prob. 7PPS Ch. 1.6 - Prob. 8PPS Ch. 1.6 - Prob. 9PPS Ch. 1.6 - Prob. 10PPS Ch. 1.6 - Prob. 11PPS Ch. 1.6 - Prob. 12PPS Ch. 1.6 - Prob. 13PPS Ch. 1.6 - Prob. 14PPS Ch. 1.6 - Prob. 15PPS Ch. 1.6 - Prob. 16HP Ch. 1.6 - Prob. 17HP Ch. 1.6 - Prob. 18HP Ch. 1.6 - Prob. 19HP Ch. 1.6 - Prob. 20HP Ch. 1.6 - Prob. 21HP Ch. 1.6 - Prob. 22HP Ch. 1.6 - Prob. 23STP Ch. 1.6 - Prob. 24STP Ch. 1.6 - Prob. 25STP Ch. 1.6 - Prob. 26STP Ch. 1.6 - Prob. 27SR Ch. 1.6 - Prob. 28SR Ch. 1.6 - Prob. 29SR Ch. 1.6 - Prob. 30SR Ch. 1.6 - Prob. 31SR Ch. 1.6 - Prob. 32SR Ch. 1.6 - Prob. 33SR Ch. 1.6 - Prob. 34S Ch. 1.6 - Prob. 35S Ch. 1.6 - Prob. 36S Ch. 1.6 - Prob. 37S Ch. 1.6 - Prob. 38S Ch. 1.6 - Prob. 39S Ch. 1 - Prob. 1QC Ch. 1 - Prob. 2QC Ch. 1 - Prob. 3QC Ch. 1 - Prob. 4QC Ch. 1 - Prob. 5QC Ch. 1 - Prob. 6QC Ch. 1 - Prob. 7QC Ch. 1 - Prob. 8QC Ch. 1 - Prob. 9QC Ch. 1 - Prob. 10QC Ch. 1 - Prob. 11QC Ch. 1 - Prob. 12QC Ch. 1 - Prob. 13QC Ch. 1 - Prob. 14QC Ch. 1 - Prob. 15QC Ch. 1 - Prob. 16QC Ch. 1 - Prob. 17QC Ch. 1 - Prob. 18QC Ch. 1 - Prob. 19QC Ch. 1 - Prob. 1MCQ Ch. 1 - Prob. 2MCQ Ch. 1 - Prob. 3MCQ Ch. 1 - Prob. 4MCQ Ch. 1 - Prob. 5MCQ Ch. 1 - Prob. 6MCQ Ch. 1 - Prob. 7MCQ Ch. 1 - Prob. 8MCQ Ch. 1 - Prob. 9MCQ Ch. 1 - Prob. 10MCQ Ch. 1 - Prob. 11MCQ Ch. 1 - Prob. 12MCQ Ch. 1 - Prob. 13MCQ Ch. 1 - Prob. 14MCQ Ch. 1 - Prob. 15MCQ Ch. 1 - Prob. 16MCQ Ch. 1 - Prob. 17MCQ Ch. 1 - Prob. 18MCQ Ch. 1 - Prob. 19MCQ Ch. 1 - Prob. 20MCQ Ch. 1 - Prob. 21MCQ Ch. 1 - Prob. 22MCQ Ch. 1 - Prob. 23MCQ Ch. 1 - Prob. 24MCQ Ch. 1 - Prob. 25MCQ Ch. 1 - Prob. 1SGR Ch. 1 - Prob. 2SGR Ch. 1 - Prob. 3SGR Ch. 1 - Prob. 4SGR Ch. 1 - Prob. 5SGR Ch. 1 - Prob. 6SGR Ch. 1 - Prob. 7SGR Ch. 1 - Prob. 8SGR Ch. 1 - Prob. 9SGR Ch. 1 - Prob. 10SGR Ch. 1 - Prob. 11SGR Ch. 1 - Prob. 12SGR Ch. 1 - Prob. 13SGR Ch. 1 - Prob. 14SGR Ch. 1 - Prob. 15SGR Ch. 1 - Prob. 16SGR Ch. 1 - Prob. 17SGR Ch. 1 - Prob. 18SGR Ch. 1 - Prob. 19SGR Ch. 1 - Prob. 20SGR Ch. 1 - Prob. 21SGR Ch. 1 - Prob. 22SGR Ch. 1 - Prob. 23SGR Ch. 1 - Prob. 24SGR Ch. 1 - Prob. 25SGR Ch. 1 - Prob. 26SGR Ch. 1 - Prob. 27SGR Ch. 1 - Prob. 28SGR Ch. 1 - Prob. 29SGR Ch. 1 - Prob. 30SGR Ch. 1 - Prob. 1PT Ch. 1 - Prob. 2PT Ch. 1 - Prob. 3PT Ch. 1 - Prob. 4PT Ch. 1 - Prob. 5PT Ch. 1 - Prob. 6PT Ch. 1 - Prob. 7PT Ch. 1 - Prob. 8PT Ch. 1 - Prob. 9PT Ch. 1 - Prob. 10PT Ch. 1 - Prob. 11PT Ch. 1 - Prob. 12PT Ch. 1 - Prob. 13PT Ch. 1 - Prob. 14PT Ch. 1 - Prob. 15PT Ch. 1 - Prob. 16PT Ch. 1 - Prob. 17PT Ch. 1 - Prob. 18PT Ch. 1 - Prob. 19PT Ch. 1 - Prob. 20PT Ch. 1 - Prob. 21PT Ch. 1 - Prob. 22PT Ch. 1 - Prob. 23PT Ch. 1 - Prob. 24PT Ch. 1 - Prob. 25PT Ch. 1 - Prob. 1E Ch. 1 - Prob. 2E Ch. 1 - Prob. 3E Ch. 1 - Prob. 4E Ch. 1 - Prob. 1STP Ch. 1 - Prob. 2STP Ch. 1 - Prob. 3STP Ch. 1 - Prob. 4STP Ch. 1 - Prob. 5STP Ch. 1 - Prob. 6STP Ch. 1 - Prob. 7STP Ch. 1 - Prob. 8STP Ch. 1 - Prob. 9STP Ch. 1 - Prob. 10STP Ch. 1 - Prob. 11STP

Additional Math Textbook Solutions

Find more solutions based on key concepts

Women’s Heights Assume that college women’s heights are approximately Normally distributed with a mean of 65 in...

Introductory Statistics

Two dice are thrown. Let E be the event that the sum of the dice is odd, let F be the event that at least one o...

A First Course in Probability (10th Edition)

Integrals of sin x and cos x Evaluate the following integrals. 17. sin3xcos2xdx

Calculus: Early Transcendentals (2nd Edition)

CHECK POINT 1 Find a counterexample to show that the statement The product of two two-digit numbers is a three-...

Thinking Mathematically (6th Edition)

ASSESSMENT Each of the following sequences is either arithmetic or geometric. Identify the sequences 230,193+82...

A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)

Find f( 3 ) if f( x )=4 x 2 +5x . (pp. 60-62)

Precalculus

Knowledge Booster

Background pattern image

$Algebra$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, algebra and related others by exploring similar questions and additional content below.

Similar questions

SEE MORE QUESTIONS

Recommended textbooks for you

Algebra and Trigonometry (6th Edition)
Algebra
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:PEARSON
Contemporary Abstract Algebra
Algebra
ISBN:9781305657960
Author:Joseph Gallian
Publisher:Cengage Learning
Linear Algebra: A Modern Introduction
Algebra
ISBN:9781285463247
Author:David Poole
Publisher:Cengage Learning
Algebra And Trigonometry (11th Edition)
Algebra
ISBN:9780135163078
Author:Michael Sullivan
Publisher:PEARSON
Introduction to Linear Algebra, Fifth Edition
Algebra
ISBN:9780980232776
Author:Gilbert Strang
Publisher:Wellesley-Cambridge Press
College Algebra (Collegiate Math)
Algebra
ISBN:9780077836344
Author:Julie Miller, Donna Gerken
Publisher:McGraw-Hill Education

Text book image

Algebra and Trigonometry (6th Edition)

Algebra

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:PEARSON

Text book image

Contemporary Abstract Algebra

Algebra

ISBN:9781305657960

Author:Joseph Gallian

Publisher:Cengage Learning

Text book image

Linear Algebra: A Modern Introduction

Algebra

ISBN:9781285463247

Author:David Poole

Publisher:Cengage Learning

Text book image

Algebra And Trigonometry (11th Edition)

Algebra

ISBN:9780135163078

Author:Michael Sullivan

Publisher:PEARSON

Text book image

Introduction to Linear Algebra, Fifth Edition

Algebra

ISBN:9780980232776

Author:Gilbert Strang

Publisher:Wellesley-Cambridge Press

Text book image

College Algebra (Collegiate Math)

Algebra

ISBN:9780077836344

Author:Julie Miller, Donna Gerken

Publisher:McGraw-Hill Education

SEE MORE TEXTBOOKS

What is a Linear Equation in One Variable?; Author: Don't Memorise;https://www.youtube.com/watch?v=lDOYdBgtnjY;License: Standard YouTube License, CC-BY

Linear Equation | Solving Linear Equations | What is Linear Equation in one variable ?; Author: Najam Academy;https://www.youtube.com/watch?v=tHm3X_Ta_iE;License: Standard YouTube License, CC-BY