Question

pls help i cant understand these question it will be a great help

Answer 1

Answer:

27)ratio is 5:7

let the ratio be 5x and 7x

now, 5x+7x=180

=>12x=180

=>x=180/12

=>x=15

therefore the angles are 5x15=75 degree and 7x15=105 degree

26) x=-1 and y=-1

equation:-2x-ky=9

Putting the values of x and y in the equation

2(-1)-k(-1)=9

=>-2+k=9

=>k=9+2

=>k=11

25)point is (3,4) i.e.(x, y)

equation:-3y=kx+7

=>3(4)=k(3)+7

=>12=k3+7

=>12-7=k3

=>k=5/3

checking

kx+7=3y

=>5/3(3)+7=3(4)

here 3 and 3 will be cancelled then,

=>12=12

it means that the value of k is correctly found...