3 years ago

Help 1 A / 7 (x + 2) -5 = 30

Mathematics

1 answer:

DaniilM [7]3 years ago

3 0

Answer:

x = 3

Step-by-step explanation:

Given

7(x + 2) - 5 = 30 ( add 5 to both sides )

7(x + 2) = 35 ( divide both sides by 7 )

x + 2 = 5 ( subtract 2 from both sides )

x = 3

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Step-by-step explanation:

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3 years ago

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3 years ago

An oval track is made by erecting semicircles on each end of a 46 m by 92 m rectangle. Find the length of the track and

Alexxandr [17]

Answer:

$Length\,\, of\,\, the\,\, track=420.44\,m\\\\Area\,\,covered \,\,by\,\, the\,\, track=5893.06\,m^2$

Step-by-step explanation:

Length of the Track:

Perimeter of the rectangle + Circumference of the two semicircle

Perimeter of the rectangle= $2(Length+Width)$

$Length=92\,m\\Width=46\,m$

Perimeter of the rectangle:

$=2(92+46)\\\\=2(138)\\\\=276\,m$

Circumference of Two Semicircle with same radius:

$r=\dfrac{46}{2} =23\,m$

$Circumference=2\times \pi \times r\\\\$

$=2\times 3.14\times 23\\\\=6.28 \times 23\\\\=144.44\,m$

Total Length of the track is :

$=276+144.44\\\\=420.44\,m$

Area Covered by the track is :

Area of the two semicircle + Area of the rectangle

$=(\pi \times r^2) + (Length\times Width)\\\\=(3.14\times (23\times 23 ))+(92\times 46)\\\\=1661.06 +4232\\\\=5893.06\,m^2$

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4 years ago

What is 42/49 in simplest form

Tcecarenko [31]

6/7 . 42 and 49 are both have the number 7 in common. So just simply divided 7 by both numbers.

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3 years ago

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