Calculate the area of trapezium cdef. show the working out

24cm²

Step-by-step explanation: From the given sides, we would try to find the unknown sides.

If abcf is a rectangle, then ba = fc and fa = cb

Which implies that:

ba = fc = 6cm

If Perimeter of abcf = 20cm

And fa = bc;

Then fa = cb = [ 20 - (ba + fc) ] / 2

= (20 - (6 + 6) ] / 2

= (20 - 12) / 2

= 8/2 = 4cm

If cb = 4cm and bd = 9cm;

Then dc = 9 - 4 = 5cm

Height of trapezium is equal to ba = fc (alternatively you can get it by measuring out 3cm from point C towards D, then draw a perpendicular line to point E) = 6cm

Parallel sides of trapezium are dc = 5cm and fe = 3cm

Area of trapezium is given by half sum of parallel side multiplied by height = (5 + 3)/2 x 6

Area = (8/2) x 6 = 4 x 6 = 24cm²

Area of trapezium is 24cm²

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

happy to

pls mark as brainliest

11

step-by-step explanation:

32.50-7.50=25

225/25=11