For each 50 mm of coloured fabric nick used to make his curtains he also uses 10 cm of white fabric express the amount of white fabric to coloured fabric as a ratio in its simplest form

2:1

Step-by-step explanation:

The ratio is the measure of the colored fabric to the white fabric. The relationship between the two units given is

10 mm = 1 cm

As such, 50 mm on conversion to cm will be

= 50/10

= 5 cm

Hence the amount of white fabric to coloured fabric as a ratio

= 10cm : 5 cm

In the simplest form

= 2:1

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi