Question

Each of 1 mark
1) State with reason whether the equation 3x2 – 7y = 13 is a linear
equation with two variables?
2) Show the condition using variable x and y: Two numbers differ by 3
3) For the equation 4x + 5y = 20 find y when x = 0
4) Write any two solutions of the equation x + y = 7.
5) Decide whether (0, 2) is the solution of the equation 5x + 3y = 6
6) Write any two solution of the equation a-b=-3
7) If x+2y=5 and 2x+y=7 then find the value of x+y
8) If Dx = 24 and x = - 3 then find the value of D.
9) The cost of the book is 5 rupees more than twice the cost of a pen. Show
this using linear equation by taking Cost of book(x) and cost of a pen(y).
10) If + = 4, write the equation in standard form.​

Answer 1

Step-by-step explanation:

3)4(0) + 5y = 20

4+5y = 20

9y = 20

y = 20 - 9

y = 11

5) 5(0) + 3(2) = 6

0 + 6 = 6

6 = 6

Therefore (0,2) is the solution for the equation.

8) D(-3) = 24

D = 24 + 3

D = 27