jessicadempsey

05.05.2021 • 

Mathematics

(10x + 4) cm 10 Mary is making rectangular picture frames to the proportions shown.
a) Determine a simplified expression for the outside perimeter of
the frame.
b) Determine the outside perimeter when x = 5 cm.
c) Determine a simplified expression for the area of one picture frane.
d) Decermine the area of one frame when x = 5 cm.
e) Determine a simplified expression for the number of square
centimetres of wood needed to make 20 frames the same size.
Assume chere is no waste.

Ответ:

dale87

03.08.2022

Mathematics

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1.8 km

Step-by-step explanation:

The scale on the map is 1 : 15000.

This means that every 1 cm on the map is equal to 15000 cm on the ground.

12 cm on the map will therefore be:

12 * 15000 = 180000 cm

Let us convert to kilometres:

100000 cm = 1 km

180000 cm = 180000 / 100000 = 1.8 km

12 cm on the map will be 1.8 km on the ground.

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