Question

Use Cramer’s rule to solve the following system of equations.
x + y = 3
x + z = 2
y + z + u = 6
y + u = 1

Answer 1

Answer:

Divide 10 into two parts in such a manner that if we add to each part its square root and form the product of the resulting sums, we obtain an integar.Giveyears = 28 years

breadth

Exercise 2.2

1.

2.

Two-thirds of a number is 5 more than half of it. What is the number?

Fifteen years from now Ravi's age will be four times his present age.

3. Ram has 3 times as many 2 coins as he has 5 coins. If he has in a

of 2 does he have?

4. The sum of three consecutive numbers is 156. Find the number w

numbers.

5. Divide 63 into two parts such that one part is

2

of the other.

Find a number whose fifth part increased by 30 is equal to itnumber is divided into two parts such that one part is 5 more than the other.If the parts are in the ratio 4:3,find the number and the two parts?

Given below are the ages of 30 students of Class-VIII in a school.

13

14

14

12.

15

15

14

13

13

14

14

13

14

14

12

14

13

12

13

14

14

13

12

13

12

13

14

15

14

an