Evaluating algebraic expressions by substitution practice exercise 4

The expression for the shaded area is ab − b. If a = 9 and b = 2, what is the area?

The expression for the shaded area is ab − b. If a = 9 and b = 2, what is the area?.  (1mark)

The expression for the shaded area is ab − b. If a = 9 and b = 2, what is the area?.  (1mark)

The expression for the shaded area is ab − b. If a = 9 and b = 2, what is the area?.  (1 mark)

Evaluate \(3p + 4q - r\) given \(p = 2\), \(q = 7\), \(r = 10\).

Evaluate \(3p + 4q - r\) given \(p = 2\), \(q = 7\), \(r = 10\). (1 mark)

Evaluate \(3p + 4q - r\) given \(p = 2\), \(q = 7\), \(r = 10\). (1 mark)

The diagram below represents a triangular sign board. If x = 4 and y = 3, calculate the perimeter of the sign board.

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1mark)

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1mark)

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1mark)

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1mark)

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1mark)

The diagram below represents a triangular field. If x = 4 and y = 3, calculate the perimeter of the triangular field.  (1 mark)

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10 2x − 4 5x + 1 Calculate the total height if x = 2.

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10, 2x − 4, 5x + 1.Calculate the total height if x = 2. (1mark)

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10, 2x − 4, 5x + 1.Calculate the total height if x = 2. (1mark)

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10, 2x − 4, 5x + 1.Calculate the total height if x = 2. (1mark)

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10, 2x − 4, 5x + 1.Calculate the total height if x = 2. (1mark)

A farmer measured three sugarcane stalks. Their heights in cm are: x + 10, 2x − 4, 5x + 1. Calculate the total height if x = 2. (1 mark)

A hardware store in Embu sells materials whose prices (in KES) are represented by: 5x − 4 2x + 10 x + 6 If x = 2, what is the total cost?

A hardware store in Embu sells materials whose prices (in KES) are represented by: 5x − 4, 2x + 10, x + 6. If x = 2, what is the total cost?  (1mark)

A hardware store in Embu sells materials whose prices (in KES) are represented by: 5x − 4, 2x + 10, x + 6. If x = 2, what is the total cost?  (1mark)

A hardware store in Embu sells materials whose prices (in KES) are represented by: 5x − 4, 2x + 10, x + 6. If x = 2, what is the total cost?  (1mark)

A hardware store in Embu sells materials whose prices (in KES) are represented by: 5x − 4, 2x + 10, x + 6. If x = 2, what is the total cost?  (1 mark)

Evaluate: 4x − y when x = 5 and y = 7.

Evaluate: 4x − y when x = 5 and y = 7.  (1mark)

Evaluate: 4x − y when x = 5 and y = 7.  (1mark)

Evaluate: 4x − y when x = 5 and y = 7.  (1 mark)

If a = 5 and b = 7, evaluate: (a² + b²) / (a + b)

If a = 5 and b = 7, evaluate:\( \frac{a^2 + b^2}{a + b} \). (1mark)

If a = 5 and b = 7, evaluate:\( \frac{a^2 + b^2}{a + b} \). (1mark)

If x = 7 and y = 3, evaluate: (x² − y) / (x − y)

If x = 7 and y = 3, evaluate: \( \frac{x ² + y}{x + y} \)

If x = 7 and y = 3, evaluate: \( \frac{x ² + y}{x + y} \)

If x = 7 and y = 3, evaluate: \( \frac{x² + y}{x + y} \)

If x = 7 and y = 3, evaluate: \( \frac{x² + y}{x + y} \)

If x = 7 and y = 3, evaluate: \( \frac{x²+ y}{x + y} \). (1mark)

If x = 7 and y = 3, evaluate: \( \frac{x² + y}{x + y} \).  (1mark)

If x = 7 and y = 3, evaluate: \( \frac{x^2+ y}{x + y} \).  (1mark)

If x = 7 and y = 3, evaluate: \( \frac{x^2+ y}{x + y} \).  (1mark)

If x = 7 and y = 3, evaluate: \( \frac{x^2+ y}{x + y} \).  (1 mark)

A carpenter in Nakuru has a board made of three wooden pieces joined together. Their lengths in cm are: 3x + 2 x + 5 2x − 1 If x = 4, what is the total length of the board?

A carpenter in Nakuru has a board made of three wooden pieces joined together. Their lengths in cm are: 3x + 2, x + 5,2x − 1. If x = 4, what is the total length of the board?  (1mark)

A carpenter in Nakuru has a board made of three wooden pieces joined together. Their lengths in cm are: 3x + 2, x + 5,2x − 1. If x = 4, what is the total length of the board?  (1mark)

A carpenter in Nakuru has a board made of three wooden pieces joined together. Their lengths in cm are: 3x + 2, x + 5,2x − 1. If x = 4, what is the total length of the board?  (1mark)

A carpenter in Nakuru has a board made of three wooden pieces joined together. Their lengths in cm are: 3x + 2, x + 5,2x − 1. If x = 4, what is the total length of the board?  (1 mark)

A school allocates KES r per student for lunch and KES s per student for drinks. If r = 50 and s = 20, evaluate the budget for 5 students using: 5r + 5s

A school allocates KES r per student for lunch and KES s per student for drinks. If r = 50 and s = 20, evaluate the budget for 5 students using: 5r + 5s.  (1mark)

A school allocates KES r per student for lunch and KES s per student for drinks. If r = 50 and s = 20, evaluate the budget for 5 students using: 5r + 5s.  (1mark)

A school allocates KES r per student for lunch and KES s per student for drinks. If r = 50 and s = 20, evaluate the budget for 5 students using: 5r + 5s.  (1 mark)