3 marks 10 Given the matrices A 3 2 and B 1 1 and that C AB find the inverse of

# 3 marks 10 given the matrices a 3 2 and b 1 1 and

• 12

This preview shows page 4 - 8 out of 12 pages.

(3 marks) 10. Given the matrices A= 3 2 and B = 1 -1 and that C = AB, find the inverse of C. 4 1 2 3 (3 marks) 4 Subscribe to view the full document.

11. A quantity P is partly constant and partly varies as the square of Q. When Q = 2, P=40 and when Q = 3, P=65. Determine the value of P when Q = 4. (3 marks) 12. Given that cos (90 – B) = √3 , determine without using trigonometric tables the value of cos B. 2 (3 marks) 13. Chebet deposited sh. 50,000 in a savings account which paid compound interest at the rate of 15% per annum. Calculate to the nearest year the time she would have to wait for her money to double. (4 marks) 5 14. In the figure, PQ is parallel to RS and the lines PS and RQ meet at T. Given that PT:TS = 2 : 3 and that RQ = 10 cm, show that triangles PTQ and STR are similar and hence find the length of RT. (4 marks) P Q z x 3 R S 15. A line passes through A(6,4) and B(8,7). Find the angle the line makes with the x-axis. (3 marks) 6 Subscribe to view the full document.  • Fall '18
• ANYANZWA

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern