A field is in the shape of a trapezium. Not to scale
210 m
190m
250m
The field produces 7200 kilograms of barley per hectare.
One hectare is 10000 m²,
Work out how many kilograms of barley the field produces.

36,000 kg

Step-by-step explanation:

✔️First, find the area of the trapezium field:

Area of trapezium = ½(a + b)*h

Where,

a = 210 m

b = 190 m

h = 250 m

Area of trapezium = ½(210 + 190)*250

= ½(400)*250

= 200*250

= 50,000 m²

✔️Find the kg of barley that 50,000 m² field will produce:

10,000 m² (1 ha) produces 7,200 kg

Therefore,

50,000 m² will produce:

(50,000*7,200)/10,000

= 5*7,200

= 36,000 kg of barley

i do not know this sorry : (

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