Explanation

The pyramids were originally constructed as tombs to bury Egyptian pharaohs and preserve their bodies for the afterlife.

They reflect the ancient Egyptians' beliefs in life after death and their reverence for their kings.

Explanation

Find a common denominator (LCM of 2, 3, and 4 is 12):

1/2 = 6/12

2/3 = 8/12

3/4 = 9/12

Add them: 6/12 + 8/12 + 9/12 = 23/12.

Explanation

"On top of" indicates that the children are playing physically on the surface or upper part of the roof.

It specifies the exact location where the action is taking place.

Explanation

A gerund is a verb form that functions as a noun and ends in -ing.

In the sentence, "driving" is the gerund as it refers to the action of driving and functions as a noun in the context.

Explanation

getche() reads a single character from the keyboard and displays (echoes) it immediately on the screen.

It's part of conio.h in C programming, often used for interactive input.

Explanation

کرنل محمد شیر خان شہید (نشانِ حیدر) ایک اصول پسند اور دیانت دار فوجی افسر تھے، جو میرٹ اور انصاف پر یقین رکھتے تھے۔

ان کے مطابق، سفارش کے کلچر کو ختم کرنے کے لیے سفارش کرنے والے کو چور سمجھ کر خوب بے عزت کرنا چاہیے تاکہ یہ رجحان ختم ہو۔

Explanation

To make x² - xy + y² a perfect square, we need to add or subtract a term that will complete the square.

Recognize that:

x² - 2xy + y² = (x - y)²

However, the given expression is:

x² - xy + y²

To match the perfect square form, we need to subtract:

xy

So, subtracting xy will make it:

x² - 2xy + y² = (x - y)²

Explanation

The sequence of plants planted each year is an arithmetic sequence with:

First term (a) = 6000

Common difference (d) = 2200

To find the number of plants in the 7th year, we need to find the 7th term:

a₇ = a + (n - 1)d

= 6000 + (7 - 1) × 2200

= 6000 + 6 × 2200

= 6000 + 13200

= 19200

Explanation

T cells identify and destroy virus-infected or abnormal cells directly.

They also activate other immune cells by releasing signaling molecules called cytokines.

Explanation

The original sentence is in active voice (present perfect tense).

In passive voice, it becomes "My wallet has been taken away."