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3 years ago

Homework: Geometry, part I (Perimeter)

Mathematics

1 answer:

Sindrei [870]3 years ago

7 0

Answer:

(I don't know if this is correct)

To find the length of the rectangle, you need to first do 20 x 2 = 40 because when you finding the perimeter you have to do W + L + W + L = P (or Wx2 + Lx2 = P). You then subtract 40 from 68 (68 - 40) where you get 28 left. you then just divide 28/2 and you get 14. I may be way off but that's how I learned it.

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45% of what number is 17.1?<br> Please help <br> 20 points

vitfil [10]

45% × ? = 17.1

17.1 ÷ 45% =

17.1 ÷ (45 ÷ 100) =

(100 × 17.1) ÷ 45 =

1,710 ÷ 45 =

38;

so 45% of 38 = 17.1

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3 years ago

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Jake sells planter boxes at the local flea market. The table shows the amount of money Jake has paid for different numbers of pl

Mariulka [41]

Answer:

1 is $1.50

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Step-by-step explanation:

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2 years ago

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Please help with this question!! I need serious help!!

asambeis [7]

Answer:

<h2>The circumference is multipled by 4.</h2>

Step-by-step explanation:

The formula of an area of a circle"

$A=\pi r^2$

The formula of a circumference of a circle:

$C=2\pi r$

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The radius has increased fourfold, therefore:

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The circumference is multipled by 4.

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Calculate the radius:

$\pi r^2=2152.96\pi$ <em>divide both sides by π</em>

$r^2=2152.96\to r=\sqrt{2152.96}\\\\r=46.4\ in$

Calculate the circumference of both circles:

$r=11.6\ in\\\\C=2\pi(11.6)=23.2\pi\ in$

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3 years ago

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Tatiana [17]

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3 years ago

Michael cycled 36km in 3 hours.<br>Work out his avarage speed.

san4es73 [151]

Hello mate,
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3 years ago

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