Revision 7 - Paper 2 Excel in Mathematics - Grade 10 (Form 4) 3. (a) Use the quadratic formula to solve the equation 3x - 4x -5= 0. Give your answers correct to 3 decimal places.
Revision 7 - Paper 2 Excel in Mathematics - Grade 10 (Form 4) 3. (a) Use the quadratic formula to solve the equation 3x - 4x -5= 0. Give your answers correct to 3 decimal places.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![Excel in Mathematics- Grade 10 (Form 4)
Revision 7 - Paper 2
Ex
a) use the quadratic formula to solve the cauatiion 3r - 4x - 5 = 0. Give your answers
correct to 3 decimal places.
Answer: (a)
13]
(b) Towns A and B are 12 km apart.
A cyclist leaves A and travels to B at an average speed of y km/h.
From B, he returns immediately to A with an average speed reduced by 2 km/h.
(i) Find, in terms of y, the time taken for the journey from A to B.
(ii) Find, in terms of y, the time taken for the return journey.
(iii) Given that the total time spent to travel from A toB and back to A is 5 hours,
write an equation satisfied by y.
(iv) Solve the equation written in part (iii).
(v) Give a simple reason why one of the values of y obtained in part (iv) is not valid.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F070d5f0b-56d6-4c86-be09-b3eab01a2cda%2F79e490c5-a391-401d-b2fe-ab9171b2bf02%2Fbsmpr8c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Excel in Mathematics- Grade 10 (Form 4)
Revision 7 - Paper 2
Ex
a) use the quadratic formula to solve the cauatiion 3r - 4x - 5 = 0. Give your answers
correct to 3 decimal places.
Answer: (a)
13]
(b) Towns A and B are 12 km apart.
A cyclist leaves A and travels to B at an average speed of y km/h.
From B, he returns immediately to A with an average speed reduced by 2 km/h.
(i) Find, in terms of y, the time taken for the journey from A to B.
(ii) Find, in terms of y, the time taken for the return journey.
(iii) Given that the total time spent to travel from A toB and back to A is 5 hours,
write an equation satisfied by y.
(iv) Solve the equation written in part (iii).
(v) Give a simple reason why one of the values of y obtained in part (iv) is not valid.
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