Question

A Multiple Choice Questions: 0.5*2=1 1.Add a positive integer, we move to the_______. (a) right (b)left (c)up (d)down 2. If you add (--230) to 520 and divide the result by 29 and multiply the result by 10 you will get (a)(--230) (b)520 (c)100 (d)290 B Fill in the blanks: 0.5*2=1 1.The most common representative value of a group of data is ___________. 2. The difference between the highest and the lowest observation gives us an idea of the spread of the observations is ________. C State whether the following statements are true or false: 0.5*2=1 1. In a quiz, positive marks are given for correct answers and negative marks are given for incorrect answers. If Jack’s scores in five successive rounds were 15, – 5, – 10, 15 and 10, total score of jack is 25 2. Integers are not closed under subtraction. D Very short type questions (I): 1x2=2 1. Write the associative of (–5) + [(–3) + (–2)] 2. Find the mode of the given set of numbers: 1, 1, 2, 4, 3, 2, 1, 2, 2, 4,1,4,2,1,1,2,4,4,2,1,4 E Short type questions (II): 2x1=2 1. Following are the margins of victory in the football matches of a league. 1, 3, 2, 5, 1, 4, 6, 2, 5, 2, 2, 2, 4, 1, 2, 3, 1, 1, 2, 3, 2, 6, 4, 3, 2, 1, 1, 4, 2, 1, 5, 3, 3, 2, 3, 2, 4, 2, 1, 2 (a)Create a table with margin of victory, tally bars and number of matches (b)Find the mode of this data.​

Answer 1

Use the quadratic formula

=−±2−4√2

x=\frac{-{\color{#e8710a}{b}} \pm \sqrt{{\color{#e8710a}{b}}^{2}-4{\color{#c92786}{a}}{\color{#129eaf}{c}}}}{2{\color{#c92786}{a}}}x=2a−b±b2−4ac

Once in standard form, identify a, b and c from the original equation and plug them into the quadratic formula.

2−16=0

x^{2}-16=0x2−16=0

=1

a={\color{#c92786}{1}}a=1

=0

b={\color{#e8710a}{0}}b=0

=−16

c={\color{#129eaf}{-16}}c=−16

=−0±02−4⋅1(−16)√2⋅1

x=\frac{-{\color{#e8710a}{0}} \pm \sqrt{{\color{#e8710a}{0}}^{2}-4 \cdot {\color{#c92786}{1}}({\color{#129eaf}{-16}})}}{2 \cdot {\color{#c92786}{1}}}x=2⋅1−0±02−4⋅1(−16)

2

Answer 2

The purpose of the u