💣 Q :103 Prep 1 Question Bank T1

Express each of the following mathematically stating its type (algebraic expression, equation, inequality, or mathematical formula):

1. Double the number X added to 5 is equal to 1

\( 2X + 5 = 1 \) (equation)

2. The area of a square (A) with side length (b)

\( A = b^2 \) (mathematical formula)

3. The speed at which a car can travel on the Cairo-Alexandria desert road must not exceed 120 km/h

\( S \leq 120 \) (inequality) where S is speed in km/h

4. Sally's age 5 years ago, if she is now X years old

\( X - 5 \) (algebraic expression)

5. The arithmetic mean of the two numbers X and y is not less than 18

\( \frac{X + y}{2} \geq 18 \) (inequality)

6. A rectangle with dimensions X and y, whose area is 36 square centimeters

\( X \times y = 36 \) (equation)

7. The perimeter (p) of a triangle, if the lengths of its sides are a, b and c

\( p = a + b + c \) (mathematical formula)

MR/Nasef.N

8. The amount of money Ahmed paid for 5 cinema tickets (each costing X LE), 3 popcorn cups (each costing y LE) after receiving a 20 LE discount on the total amount

\( 5X + 3y - 20 \) (algebraic expression)

9. Basem has X one-pound banknotes, y five-pound banknotes, and z ten-pound banknotes

\( X + 5y + 10z \) (algebraic expression)

MR/Nasef.N