Explanation

In C programming, && is the logical AND operator, used to evaluate whether both conditions are true.

It differs from &, which is a bitwise AND operator.

Explanation

Given the direct variation between x² and y, we can write:

x² = ky

where k is the constant of variation.

Step 1: Find the constant of variation k

When x = 7 and y = 49:

7² = k * 49

49 = k * 49

k = 1

Step 2: Write the equation of variation

x² = y

Step 3: Find x when y = 100

x² = 100

x = ±√100

x = ±10

The answer is: 10, -10.

Explanation

The given quadratic expression is x² - 2x + 1.

This can be factored as:

x² - 2x + 1 = (x - 1)(x - 1)

= (x - 1)²

The answer is (x - 1)(x - 1).

Explanation

Perimeter formula for a rectangle: 2 × (Length + Width)

2 × (210 + 118) = 2 × 328 = 656 cm

Explanation

An inflectional ending is added to the end of a word to modify its tense, number, or form (e.g., -s, -ed, -ing).

It helps show grammatical relationships without changing the core meaning of the word.

Explanation

Distance = Speed × Time

= 102 km/hr × 12 hours

= 1224 km

Now, let's find the time it takes to cover the same distance at 96 km/hr:

Time = Distance / Speed

= 1224 km / 96 km/hr

= 12.75 hours

To convert hours to minutes:

12.75 hours × 60 minutes/hour = 765 minutes

Explanation

"Therefore" shows a cause-and-effect relationship between being tired and taking a nap.

It logically connects the reason (tiredness) with the result (taking a nap).

Explanation

Sublimation is the process where a solid directly changes into gas without becoming liquid.

Dry ice (solid CO₂) undergoes sublimation at room temperature.

Explanation

خوش و خرم میں "و" حرف عطف ہے جو دونوں صفات (خوش اور خرم) کو آپس میں جوڑتا ہے۔

اس جملے میں "و" حروف عطف کے طور پر کام کرتا ہے۔

Explanation

In passive voice, the object (the piano) becomes the subject, and the verb form changes accordingly.

"Who" changes to "By whom," and the correct structure is "By whom was the piano stolen?"