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3 years ago

The area of a rectangle 54 cm2. and its length =9cm. find :

Mathematics

1 answer:

alexira [117]3 years ago

4 0

Answer:

A) 6cm

B) 2:3

C) 1:5

Step-by-step explanation:

A) area of rectangle = width × length

54cm^2 = x × 9

x = 54 ÷ 9

width = 6cm

B) the width = 6cm

the length = 9cm

the ratio between the width and the length

=》6cm : 9cm

if you simplify, it becomes 2: 3

C) the perimeter of the rectangle

= (2 × width) + (2 × length)

= (2 × 6) + (2 × 9)

= 12 + 18

= 30 cm

the ratio between the width and the perimetet

=》 6cm : 30 cm

if you simplify, it becomes 1 : 5

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3 years ago

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Using the combination formula, it is found that:

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B. 21 combinations are possible.

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<h3>What is the combination formula?</h3>

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by:

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Exercise 1, item a:

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Item b:

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2 years ago

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Step-by-step explanation:

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