Explanation

To solve for x:

9x - 3 = 15

Add 3 to both sides:

9x = 18

Divide by 9:

x = 2

Now, substitute x into the second equation:

3x - 1 = 3(2) - 1

= 6 - 1

= 5

Explanation

Invaders such as Mahmud of Ghazni, Muhammad Ghori, and the Mughals raided the Indian subcontinent for wealth, prisoners, and territorial expansion.

Their invasions led to the establishment of various dynasties and the spread of new cultures, religions, and administrative systems in the region.

Explanation

The Basic Teaching Model (BTM) focuses on structured teaching with clear objectives, instructional processes, and evaluation.

It emphasizes a systematic approach to instruction, ensuring effective learning outcomes.

Explanation

We know that 1/7 of x is 4:

(1/7)x = 4

To find x, multiply both sides by 7:

x = 4 × 7

x = 28

Now, find 1/4 of x:

(1/4)x = (1/4) × 28

= 7

Explanation

Ontology deals with the nature of reality and existence in education.

Epistemology focuses on knowledge and how it is acquired.

Axiology examines values, including ethics and aesthetics, in education.

All three are fundamental to the philosophy of education.

Explanation

The cochlea contains the vestibular system, including the semicircular canals, which help maintain balance.

It detects head movements and sends signals to the brain for coordination and posture control.

Explanation

Kashmir Solidarity Day on 5th February was initiated by Qazi Hussain Ahmad in 1990 to express support for the Kashmiri people.

It became an official public holiday in Pakistan, observed annually to highlight the Kashmir issue.

Explanation

حدیث مبارکہ کے مطابق، جو بندہ کثرت سے استغفار کرتا ہے، اللہ تعالیٰ اسے ایسی جگہ سے رزق عطا کرتا ہے جہاں سے وہ گمان بھی نہیں کرتا۔

استغفار برکت، روزی، اور مشکلات کے حل کا ذریعہ ہے۔

Explanation

"This is the best peach producing valley" 

Grammatically awkward. It should be:

 "This is the best peach-producing valley."

(Hyphenate "peach-producing" as it's a compound adjective.)

"I done matric in 2010" 

Incorrect verb form. It should be:

"I did matric in 2010"

("Done" is the past participle; here we need the simple past, "did.")

"This is an utensil" 

"An" is used before vowel sounds, not just vowels.

 The correct sentence is: "This is a utensil."

Because "utensil" starts with a 'yoo' sound, which is a consonant sound.

So, since all the options have errors, the correct choice is:

"None of these"

Explanation

Surface area – Greater surface area increases the rate of evaporation.

Wind speed – Higher wind speed removes water vapor quickly, enhancing evaporation.