2 years ago

A semicircle has a radius of 8.2cm and pi=3.142 work out the area of the semicircle to 1 decimal place

Mathematics

1 answer:

Pepsi [2]2 years ago

7 0

Is there a picture ?

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Help please really needed

Anarel [89]

Answer:

Either :

1/2 10x+1/2 20y+1/2 10z

5x+10y+5z

Step-by-step explanation:

You're just multiplying everything by 1/2

7 0

2 years ago

The rectangle below has an area of x^2-15x+56x square meters and a length of x-7 meters.

Gennadij [26K]

$Heya \: \: ! \\ \\ \\ Area \: of \: rectangle \: = Length \: \times Width \\ \\ We \: are \: given \: that \: , \\ \\ Length \: = \: \: ( \: x - 7 \: ) \: metres \\ Area \: \: \: \: \: = \: \: \: ( \: {x}^{2} - 15x + 56 \: ) \: square \: meters \\ \\ Therefore \: \: , \: \\ {x}^{2} - 15x + 56 = ( \: x - 7) \times Width \\ \\ Width = \frac{ ({x}^{2} - 15x + 56 )}{(x - 7)} \\ \\ Width = \frac{(x - 7)(x - 8)}{(x - 7)} \\ \\ \\ Width = ( \: x - 8 \: ) \: \: m \: \: \: \: \: \: \: \: \: Ans.$