10 (a) Finley is asked to solve the equation $5x + 4 = 19$ - OCR - GCSE Maths - Question 10 - 2023 - Paper 1
Question 10
10 (a) Finley is asked to solve the equation $5x + 4 = 19$.
Finley’s working is shown below.
$$
5x + 4 = 19
5x = 19 - 4
5x = 15
x = 4.6
$$
Write down the... show full transcript
Worked Solution & Example Answer:10 (a) Finley is asked to solve the equation $5x + 4 = 19$ - OCR - GCSE Maths - Question 10 - 2023 - Paper 1
Step 1
Finley's error
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Answer
Finley incorrectly calculated the value of x. The equation 5x=15 leads to x=3, not x=4.6. He made a mistake while subtracting 4 from 19.
Step 2
Charlie's error
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Answer
Charlie incorrectly applied the formula. The correct formula is rearranged to find the initial velocity u, given by u=v−at. This should lead to u=29−(5imes3)=29−15=14. Thus, he miscalculated the initial velocity.
