Question
I. 99 x² + 31 x – 110 = 0 II. 6y²
- 31y + 35 = 0Solution
I. 99 x² + 31 x – 110 = 0 I. 99 x² + 121 x - 90 x – 110 = 0 11 x(9 x + 11) – 10(9 x + 11) = 0 (11 x – 10) (9 x + 11) = 0 ∴x = 10/11 ,- 11/9 II. 6y² - 31y + 35 = 0 6y² - 10y - 21y + 35 = 0 2 y(3 y – 5) - 7 (3 y – 5) = 0 (2 y – 7) (3 y – 5) = 0 ∴y = 7/2 ,5/3 Hence, x<y
What number has to be added to each term of 5:6 to make the ratio 7:8?
What is the fourth proportional to 5, 9, 25?
If the ratio of number of boys and girls present in the playground is 5:4. 10 boys left the playground, leaving total number of girls same as the boys p...
The ratio between two numbers is 6:7. If each number is increased by 9, the ratio between then become 9:10, find the difference between numbers.
Ratio between two numbers is 8:11 and their difference is 39. Find the sum of the given two numbers.
- If βAβ, βBβ and βCβ are in proportion in the given order while βAβ = 18 and βBβ = 54, then find the value of βCβ.
P, Q and R together started a business. Six times the investment of P equals seven times the investment of Q and the capital of Q is twice that of R. Fi...
The ratio of the incomes of Vineet and Vidya is 8:3 respectively. Vineet saves 30% of his income while Vidya saves 20% of his income. The sum of their e...
What is the fourth proportion of 17, 30 and 51?
The ratio of the incomes of Vineet and Vidya is 8:5 respectively. Vineet saves 25% of his income while Vidya saves 20% of his income. The sum of their e...