Explanation

Given x + 1/x = 10:

Step 1: Square both sides

(x + 1/x)² = 10²

x² + 2(x)(1/x) + 1/x² = 100

x² + 2 + 1/x² = 100

Step 2: Solve for x² + 1/x²

x² + 1/x² = 100 - 2

x² + 1/x² = 98

Explanation

Security mirrors help inspect the underside of vehicles for hidden objects.

Commonly used at checkpoints, military bases, and secure facilities.

Explanation

Handheld metal detectors commonly use batteries ranging from 1.5V (AA) up to 9V.

This low voltage powers the device for portability and safety.

Explanation

Many handheld metal detectors commonly use 9V batteries, and their operating voltage often falls within the 6V-9V range.

Some sources might mention a lower range like 3-5V for simpler detectors, while others specify a slightly higher range like 7-9V. 

Explanation

"On" is used for specific dates (e.g., "on 23rd June").

"In" is for months/years (e.g., "in June").

"At" is for precise times (e.g., "at 9 AM").

Explanation

The main aim of security is to safeguard people, property, and information.

This includes protection from theft, harm, or unauthorized access.

Explanation

A suicide jacket, also known as an explosive vest or suicide vest, is a garment worn by attackers that is rigged with explosives and a detonation mechanism intended for use in suicide bombings.

Explanation

The Arabic "Baa" (بِ) in "Bismillah" can mean with, in, or by depending on context.

It reflects seeking help or blessing through Allah's name.

Explanation

⇒ Number of girls = 20

⇒ Number of boys = 15

The ratio of girls to boys: ⇒ Girls: Boys = 20:15

⇒ Girls: Boys = 20 ÷ 5: 15 ÷ 5 ⇒ Girls: Boys = 4:3

Explanation

The correct formula to calculate a winner's election percentage is:

(Winner’s votes ÷ Total votes) × 10