Mixed Topic Worksheet Grades 6/7: Day 003
- 1
Question 1. Solve 2x - 3 < 9
Solving Single Inequalities▶ Show worked answerHide worked answer
- M1: add 3 to both sides, 2x < 9 + 3
- A1: x < 6
Answer: x < 6[2 marks] - 2
Question 2. Make x the subject of y = 2x² + 7
x is positive.Rearranging Harder Equations▶ Show worked answerHide worked answer
- M1: subtracts 7 from both sides, giving y - 7 = 2x²
- M1: divides by 2, giving x² = dfracy - 72
- A1: takes the square root, giving x = sqrtdfracy - 72
Answer: x = sqrtdfracy - 72[3 marks] - 3
Question 3. An estimate of the number of newts in a pond is 400.
The estimate was found by marking 50 newts in the first catch.
In the second catch there were 32 newts, some of which were marked.
Work out how many newts in the second catch were marked.Capture-Recapture▶ Show worked answerHide worked answer
- M1: 400 = 50 × 32 ÷ c
- M1: c = 50 × 32 ÷ 400
- A1: 4
Answer: 4[3 marks] - 4
Question 4. p is inversely proportional to the square root of q.
p = 6 when q = 25.
Find the value of p when q = 36.Algebraic Inverse Proportion▶ Show worked answerHide worked answer
- M1: 6 = k ÷ √25
- M1: p = 30 ÷ √36
- A1: 5
Answer: 5[3 marks] - 5
Question 5. The graph shows a runner's distance from the start against time. The tangent to the curve at 4 seconds passes through (2, 0) and (6, 16). Work out the speed of the runner at 4 seconds.
Instantaneous Gradients of Lines▶ Show worked answerHide worked answer
- M1: (16 − 0) ÷ (6 − 2)
- A1: 4
Answer: 4[2 marks]
Mixed Topic Worksheet Grades 6/7: Day 003
- 1
Question 1. Solve 2x - 3 < 9
[2 marks]Solving Single Inequalities▶ Show worked answerHide worked answer
- M1: add 3 to both sides, 2x < 9 + 3
- A1: x < 6
Answer: x < 6 - 2
Question 2. Make x the subject of y = 2x² + 7
[3 marks]
x is positive.Rearranging Harder Equations▶ Show worked answerHide worked answer
- M1: subtracts 7 from both sides, giving y - 7 = 2x²
- M1: divides by 2, giving x² = dfracy - 72
- A1: takes the square root, giving x = sqrtdfracy - 72
Answer: x = sqrtdfracy - 72 - 3
Question 3. An estimate of the number of newts in a pond is 400.
[3 marks]
The estimate was found by marking 50 newts in the first catch.
In the second catch there were 32 newts, some of which were marked.
Work out how many newts in the second catch were marked.Capture-Recapture▶ Show worked answerHide worked answer
- M1: 400 = 50 × 32 ÷ c
- M1: c = 50 × 32 ÷ 400
- A1: 4
Answer: 4 - 4
Question 4. p is inversely proportional to the square root of q.
[3 marks]
p = 6 when q = 25.
Find the value of p when q = 36.Algebraic Inverse Proportion▶ Show worked answerHide worked answer
- M1: 6 = k ÷ √25
- M1: p = 30 ÷ √36
- A1: 5
Answer: 5 - 5
Question 5. The graph shows a runner's distance from the start against time. The tangent to the curve at 4 seconds passes through (2, 0) and (6, 16). Work out the speed of the runner at 4 seconds.
[2 marks]Instantaneous Gradients of Lines▶ Show worked answerHide worked answer
- M1: (16 − 0) ÷ (6 − 2)
- A1: 4
Answer: 4
Mixed Topic Worksheet Grades 6/7: Day 003
- 1
Question 1. Solve 2x - 3 < 9
Solving Single Inequalities▶ Show worked answerHide worked answer
- M1: add 3 to both sides, 2x < 9 + 3
- A1: x < 6
Answer: x < 6[2 marks] - 2
Question 2. Make x the subject of y = 2x² + 7
x is positive.Rearranging Harder Equations▶ Show worked answerHide worked answer
- M1: subtracts 7 from both sides, giving y - 7 = 2x²
- M1: divides by 2, giving x² = dfracy - 72
- A1: takes the square root, giving x = sqrtdfracy - 72
Answer: x = sqrtdfracy - 72[3 marks] - 3
Question 3. An estimate of the number of newts in a pond is 400.
The estimate was found by marking 50 newts in the first catch.
In the second catch there were 32 newts, some of which were marked.
Work out how many newts in the second catch were marked.Capture-Recapture▶ Show worked answerHide worked answer
- M1: 400 = 50 × 32 ÷ c
- M1: c = 50 × 32 ÷ 400
- A1: 4
Answer: 4[3 marks] - 4
Question 4. p is inversely proportional to the square root of q.
p = 6 when q = 25.
Find the value of p when q = 36.Algebraic Inverse Proportion▶ Show worked answerHide worked answer
- M1: 6 = k ÷ √25
- M1: p = 30 ÷ √36
- A1: 5
Answer: 5[3 marks] - 5
Question 5. The graph shows a runner's distance from the start against time. The tangent to the curve at 4 seconds passes through (2, 0) and (6, 16). Work out the speed of the runner at 4 seconds.
Instantaneous Gradients of Lines▶ Show worked answerHide worked answer
- M1: (16 − 0) ÷ (6 − 2)
- A1: 4
Answer: 4[2 marks]