Math, asked by Itzkrushika156, 25 days ago

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Answered by tennetiraj86
12

Step-by-step explanation:

Answers:-

1)

The number of flowers as many as the trees in a garden the total flowers are 400 then find the number of trees in the garden?

solution:-

Let the number of flowers be X

Number of trees = Number of flowers = X

Total flowers in the garden = X×X = X^2

Total number of flowers = 400

=>X^2 = 400

=>X^2-400 = 0 it is a quadratic equation

=>X^2-20^2 = 0

=>(X+20)(X-20) = 0

=>X+20= 0 or X-20 = 0

=>X = -20 or 20

But X cannot be negative

X= 20

Number of trees = 20

2)Given lines are ax+by = 9---(1)

and. bx+ay = 5-----(2)

Given Intersecting point is (3,-1)

If it is the Intersecting point of both lines then it is a solution of these lines and then it satisfies the given lines

Putting x = 3 and y = -1

equation (1) becomes

=>a(3)+b(-1)=9

=>3a-b = 9------(3)

=>b = 3a-9 -----(4)

equation (2) becomes

=>b(3)+a(-1) = 5

=>3b-a = 5------(5)

from (4) then

=>3(3a-9)-a = 5

=>9a-27-a = 5

=>8a-27 = 5

=>8a = 5+27

=>8a = 32

= >a=32/8

=>a=4

On Substituting the value of a in (4) then

b= 3(4)-9

=>b = 12-9

=>b = 3

a=4

b=3

The values of a and b are 4 and 3 respectively.

Answered by Anonymous
59

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