Question
(i) x² – 3x – 40 = 0 (ii) y² + 11y + 30 =
0 In each of these questions, two equations (i) and (ii) are given. You have to solve both the equations and give answers:Solution
(i) x² – 3x – 40 = 0 => x² – 8x + 5x – 40 = 0 => x (x – 8) + 5(x – 8) = 0 => (x – 8) (x + 5) = 0 => x = 8, -5 (ii) y² + 11y + 30 = 0 => y² + 6y + 5y + 30 = 0 => y (y + 6) + 5 (y + 6) =0 => (y + 5) (y + 6) =0 => y = -6, – 5 Hence, x ≥ y.
- A container ‘X’ holds 400 litres of a solution which is 5/8th milk and the rest is water. 30% of this solution is poured into container ‘Y’, which ...
Which PowerPoint view displays each slide of the presentation as thumbnail and is useful for rearranging slides?
After 3 years, B’s age will be?
Passage
Since a diversified diet that meets all nutritional requirements is difficult to provide, fortification of food is relied upon by many ...
- The rate of simple interest for which ₹12,000 will amount to ₹14,400 in 5 years is:
Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
21 * 4 * 156 * 13 * 11 = 83
- In a classroom, students like three different subjects: Math, Science and English in the ratio 5:4:11. If 364 students like Science, then how many students...
What is Phishing in terms of computer security?
- If 40% of ‘x’ is 10 less than 60% of ‘y’ and the sum of ‘x’ and ‘y’ is 250, then what is the value of ‘x – y’?
The ratio of zinc and copper in a brass pieces is 2:5. How much zinc will be there in 140 kg of such a piece?
Relevant for Exams:
