Question

Question number 28...

Answer 1

Answer:

The answer of 29 is 70 degree Celsius

Answer 2

Answer:

28.-

let cost of chair be x and cost of table be y

The linear equation is

4x+5y=3200

take x=5

4(5)+5y=3200

5y=3200-20

5y=3180

y=636

therefore the first solution is

(5 , 636)

if we take y=4

4x+5(4)=3200

4x=3200-20

4x=3180

x=795

therefore the second solution is (795 , 4)

OR

Solve for x:

           (5 x+1)(x+3)-8   =  5(x+1)(x+2)

5 x^2 + 15 x + x + 3 - 8 =  5 (x^2 + x + 2 x + 2)

5 x^2 + 16 x - 5              = 5 x^2 + 5 x + 10

5 x^2 - 5 x^2 + 16 x - 5 x -5 -10 = 0

                        11 x -15 = 0

                           11 x    = 15

                                x    =  15/11

mark me as brainliest