21:52
4. Solving simultaneous equations by elimination Method.
18:26
5. Solving simultaneous equations having three unknowns.
15:51
6. Solving Simultaneous Linear equations of two variables or unknowns by Cramerβs rule.
14:54
3. Solving Simultaneous equations by using substitution method.
04:08
2.Introduction to simultaneous linear equations.
03:59
1.An overview of the Algebra chapter
00:52
20. What are the dangers of x-rays
04:11
19. What are the properties of x-rays?
02:38
18. State how the intensity of X-rays in an X-ray tube can be increased.
01:49
17. The anode of an X-ray tube becomes hot when the tube is in use. State the reason for this.
03:23
16. Figure 5 shows a narrow beam of X-rays passing between two metal plates in air.
05:18
15. Figure 18 shows parts of an X-ray tube.a) Explain why:i. A potential difference is applied to .
01:38
14. An X-ray tube produces soft x-rays. State the adjustments that may be made so that the tube
03:48
13.In an x-ray tube it is observed that the intensity of X-rays increases when potential difference
10:11
12. X-rays are used for detecting cracks inside metal beams i. State the type of the X rays used...
02:56
11. The accelerating of a certain X-ray tube is increased. State the change observed on the X-rays
01:29
10. State with a reason the effect of the X-rays produced in an X-ray tube, when the p.d across the
01:25
9. The target of X-ray tube is made of metals of high melting point. Give a reason for this.
02:03
8. State one difference between hard and soft X-rays.
02:24
7. Give a reason why the target in an X-ray tube is made of tungsten or molybdenum.
00:32
6. State the property of X-rays, which makes it possible to detect cracks in bones.
04:19
5. State the factor that determines the hardness of the X-rays produced in an X-ray tube.
01:35
4. State and explain the effect of increasing the E.H.T in an X-ray tube on the X-rays produced.
02:49
3. State the energy transformation when fast moving electrons are suddenly stopped by a target
03:16
2. State one industrial use of Xrays.
01:26
1. Name the metal used to shield X-rays operators from the radiation. Give a reason why it is used.
05:10
26. A swimming coach intends to choose 3 swimmers from group of 5. Determine the number of
05:57
25. Given that the universal set is the set of all even numbers less than 30
01:30
24.Define each of the following terms as used in probability: i)Event; ii)Outcome: iii)Sample space.
08:31
23.Use the inverse matrix method to solve the following systems ofequation:3π₯ + 2π¦ = 33 5π₯ β 7π¦ = β7
06:36
22. Use the Pascalβs triangle to expand the binomial expression (2π₯ β 5)^4.
02:20
21. With the aid of a sketch, describe the three types of Kurtosis in statistics.
08:34
20. Table 2 shows lunch preferences for 195 students when taken out for three different trips.
04:52
19. Use the substitution method to solve the following set of equations:π¦ β 4π₯ = 3π¦ + 3π₯ = 17
12:55
18. Table 1 shows the frequency distribution of weight o fpatients who attended a hospital. Use it
12:21
15. Use the binomial theorem to expand the binomial expression (π₯ β 2π¦)^5 .
04:27
16. Given three sets A, B and C, draw a Venn diagram and shade the area representing each of the
00:18
17. Outline two types of skewness in statistics.
01:19
14. Outline five advantages of arithmetic mean as a measure of central tendency in statistics.
00:48
13. Differentiate between floating point and fixed point methods of data representation.
04:06
12. A quadratic equation has Z and -3 as its roots. Determine its equation.
10:21
11. Given matrix S and R, show that i) SRΗΗRS ii)(SR)T =ST RT .
04:10
9. Determine the fourth term of the expression (3π₯ + π¦)7.
01:57
10. Explain each of the following terms as used in statistics. a)discrete variable; b)continuous
09:49
5. Use the binomial theorem to expand the following expression (4π₯ + 3)^4.
06:14
8. Solve 5π₯ β€ β4π¦ β 12 and represent the solution on a graph.
03:19
7. Given matrices X and Y Determine X+3Y.
02:20
6. Describe each of the following matrices: a)Diagonal matrix: b)Triangular matrix.
03:09
4. Given that set U={a, b, c, d,b, e, f, g, h}, B={a, c, d, e}and A={a, b, c};Determine each of the
05:57
3. Use graphical method to solve the following set ofequations:4π¦ + 3π₯ = 100 4π¦ β 193 = 12
07:17
2. Convert the octal number3258 to its equivalent for each of the following number systems :a)Excess
04:37
1. Convert the decimal number742310 to its equivalent for each of the following number systems:
22:18
28. Given that a matrix A, determine A^-1 using the co-factor method.
22:12
27. Table 1 shows the age distribution of 30, 100 policy holders in a certain insurance company.
01:15
26. State two characteristics of binomial distribution.
09:20
23. Using the matrix method, solve the following simultaneous equations.3x-y=114 x+3y=32
00:39
25. Write the following abbreviations in full as used in computer coding.(i.) ASCII;(ii.) EBCDIC.
01:19
24. John intends to prepare a questionnaire to collect statistical data in a work environment survey
08:53
22. Using the Pascalβs triangle,expand (x+2y)^6 in descending powers of x
04:43
21. State the binomial theorem where n is a positive integer
X
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