Explanation

• Al-Khwarizmi is known as the Father of Algebra for writing the first systematic book on algebra.
• He wrote Al-Kitab al-Mukhtasar fi Hisab al-Jabr wal-Muqabala in the 9th century.
• The word “Algebra” comes from “Al-Jabr” in his book title.

Last verified on 24-06-2026

Explanation

The sum of all interior angles in any triangle is always 180 degrees.

A fundamental rule in Euclidean geometry, regardless of the triangle's shape (e.g., right, equilateral, scalene).

This property is known as the Angle Sum Property.

Last verified on 23-05-2026

Explanation

9 KG = 9000 grams

Packages = 9000 / 450

= 20

Last verified on 30-03-2026

Explanation

Explanation

Explanation

• In statistics and research, hypotheses are used to test ideas.
• The null hypothesis (H₀) states that there is no effect or difference.
• The hypothesis that states there is an effect or difference is called the alternate hypothesis (H₁).

Last verified on 23-01-2026

Explanation

a*b = (a+b) + ab

3_4 = (3+4) + 3×4 = 7 + 12 = 19

2_3 = (2+3) + 2×3 = 5 + 6 = 11

(3_4) - (2_3) = 19 - 11 = 8

Explanation

Speed = 90 km/h = 25 m/s

Distance = 25 × 21 = 525 m

Length of tunnel = 525 - 130 = 395 m

Last verified on 22-01-2026

Explanation

A voucher is a document that records a financial transaction.

It can serve as a wages sheet for employee salary payments.

It can also act as a bank receipt for money received.

It can be a payment bill to authorize payments to suppliers or creditors.

Vouchers are essential for accounting, auditing, and financial control

Explanation