Question

I WANT IT VERY VERY FAST​

Answer 1

Answer:

Step-by-step explanation:

1 . Write each of the following equations in the form ax + by + c = 0 and indicate the values of a, b and c

(i) 4 = 5x - 3y

=> 5x - 3y = 4

=> 5x - 3y - 4 = 0

Here, we have,

a = 5

b = -3

c = -4

(ii) 2x + 3y - 2 = 0

ax + bx + c

so,

a= 2

b= 3

c= -2.

2.  Let the cost of a sweet box   = Rs x        

  The cost of a pen = y          

According to the condition, we have                          

 [Cost of a notebook] = 3 × [Cost of a pen]        

  i.e.   x = 3 × Y    or       x = 3y     or       x – 3y = 0      

Thus, the required linear equation is x– 2y = 0

3. (iii) infinity  many solution

4. 2 x  + y  =  8 ... A

2 x  −  y  =  8 ... B

A +B  

4 x  =  16

x  =  4

If  x  =  4  ,  y =  0

5. value of k if x=3 and y=2

3×3+4×2=k

9+8=k

17=k