Explanation

A teacher's polite and well-spoken behavior reflects their conduct, which involves professionalism, manners, and interpersonal behavior.

It shows how a teacher carries themselves ethically and respectfully in the classroom.

Explanation

Given:

x : y = 3 : 4

y : z = 6 : 7

To combine, equalize y in both ratios (LCM of 4 and 6 is 12):

x : y = 9 : 12

y : z = 12 : 14

Combine to get: x : y : z = 9 : 12 : 14

Explanation

The phrase "What she had written" follows the correct word order for a noun clause.

It functions as the object of the preposition "by" in the sentence.

Explanation

A chemical property describes a substance’s ability to undergo a change that alters its chemical identity.

Examples include flammability, reactivity with acids, or ability to rust.

Explanation

To factorize 4x² + 7x + 3:

Let's find two numbers that multiply to 4*3 = 12 and add to 7:

The numbers are 4 and 3 (since 4 + 3 = 7 and 4 * 3 = 12).

Now, rewrite the middle term:

4x² + 4x + 3x + 3

Factor by grouping:

4x(x + 1) + 3(x + 1)

(4x + 3)(x + 1)

The correct answer is (x + 1)(4x + 3).

Explanation

"Junior" is an adjective that describes someone as being younger or of lower status.

When using "junior" in a comparison, you use "to" instead of "than".

"By" is used to indicate the age difference (e.g., by four years). 

Explanation

The sentence has one independent clause: "Neither Salma nor Aisha ate dinner after a long day at work."

There are no dependent clauses or coordinating conjunctions linking multiple independent clauses, so it is a simple sentence despite having a compound subject.

Explanation

Every real number is either a rational or irrational number: True. A real number can either be expressed as a fraction (rational) or cannot (irrational).

Every whole number is a natural number: False. Whole numbers include 0, but natural numbers start from 1. Therefore, 0 is a whole number but not a natural number.

All natural numbers are integers: True. Natural numbers are a subset of integers.

All integers are rational numbers: True. Every integer can be written as a fraction (e.g., 

5 = 5/1), so all integers are rational.

Explanation

She told me that she was reading about politics those days.

Present continuous (am reading) changes to past continuous (was reading).

"These days" changes to "those days" in indirect speech.

Explanation