Simple Equations Exercise 4.4 1). Set up equations and solve them to find the unknown numbers in the following cases: (a) Add 4 to eight times a number; you get 60. Let the given number be x By the given condition of the problem 8x + 4 = 60 Transposing 4 to RHS 8x …
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Simple Equations Exercise 4.3 1). Solve the following equations: (a) 2 y + 5/2 = 37/2 (b) 5t + 28 = 10 (c) a/5 + 3 = 2 (d) q/4 + 7 = 5 (e) 5/2 x = –5 (f) 5/2 x = 25/4 (g) 7m+ 19/2 =13 (h) …
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Simple Equations Exercise 4.2 1). Give first the step you will use to separate the variable and then solve the equation: (a) x – 1 = 0 (b) x + 1 = 0 (c) x – 1 = 5 (d) x + 6 = 2 (e) y – 4 = – 7 …
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Simple Equations Exercise 4.1 1). Complete the last column of the table. Answer: S No. Equation Value Say, whether the Equation is satisfied (Yes/No) i x + 3 = 0 x = 3 No ii x + 3 = 0 x = 0 No iii x + 3 = 0 x = -3 Yes iv …
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Data Handling Exercise 3.4 1). Tell whether the following is certain to happen, impossible, can happen but not certain. (i) You are older today than yesterday. (ii) A tossed coin will land heads up. (iii) A die when tossed shall land up with 8 on top. (iv) The next traffic light seen will be …
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Data Handling Exercise 3.3 1). Use the bar graph (Fig 3.3) to answer the following questions. (a) Which is the most popular pet? (b) How many students have dog as a pet? Answer: (a) Which is the most popular pet? cats (b) How many students have dog as a pet? 8 2). Read the …
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Data Handling Exercise 3.2 1). The scores in mathematics test (out of 25) of 15 students is as follows: 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20. Find the mode and median of this data. Are they the same? The scores in ascending order is 5, 9, …
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Data Handling Exercise 3.1 1). Find the range of heights of any ten students of your class. The heights of any ten students of the class are 134, 132, 132, 135, 124, 130, 128, 141, 125, 137. Highest height = 141 Lowest height = 124 Range = highest height – lowest height …
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