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FinnZ [79.3K]
3 years ago
7

The width of a rectangle is 3ft more than one half it's length, and the perimeter of the rectangle is 36ft. Therefore, the legth

and width of the rectangle are respectively what

Mathematics
1 answer:
V125BC [204]3 years ago
7 0

Answer:length = 22. And width = 3+ 1/2(22) = 14

Step-by-step explanation:

In the attachment

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Help with geometry hw
tiny-mole [99]

QUESTION 1

Let the third side of the right angle triangle with sides x,6 be l.

Then, from the Pythagoras Theorem;

l^2=x^2+6^2

l^2=x^2+36

Let the hypotenuse of  the right angle triangle with sides 2,6 be m.

Then;

m^2=6^2+2^2

m^2=36+4

m^2=40

Using the bigger right angle triangle,

(x+2)^2=m^2+l^2

\Rightarrow (x+2)^2=40+x^2+36

\Rightarrow x^2+2x+4=40+x^2+36

Group similar terms;

x^2-x^2+2x=40+36-4

\Rightarrow 2x=72

\Rightarrow x=36

QUESTION 2

Let the hypotenuse of the triangle with sides (x+2),4 be k.

Then, k^2=(x+2)^2+4^2

\Rightarrow k^2=(x+2)^2+16

Let the hypotenuse of the right triangle with sides 2,4 be t.

Then; we have t^2=2^2+4^2

t^2=4+16

t^2=20

We apply the Pythagoras Theorem to the bigger right angle triangle to obtain;

[(x+2)+2]^2=k^2+t^2

(x+4)^2=(x+2)^2+16+20

x^2+8x+16=x^2+4x+4+16+20

x^2-x^2+8x-4x=4+16+20-16

4x=24

x=6

QUESTION 3

Let the hypotenuse of the triangle with sides (x+8),10 be p.

Then, p^2=(x+8)^2+10^2

\Rightarrow p^2=(x+8)^2+100

Let the hypotenuse of the right triangle with sides 5,10 be q.

Then; we have q^2=5^2+10^2

q^2=25+100

q^2=125

We apply the Pythagoras Theorem to the bigger right angle triangle to obtain;

[(x+8)+5]^2=p^2+q^2

(x+13)^2=(x+8)^2+100+125

x^2+26x+169=x^2+16x+64+225

x^2-x^2+26x-16x=64+225-169

10x=120

x=12

QUESTION 4

Let the height of the triangle be H;

Then H^2+4^2=8^2

H^2=8^2-4^2

H^2=64-16

H^2=48

Let the hypotenuse of the triangle with sides H,x be r.

Then;

r^2=H^2+x^2

This implies that;

r^2=48+x^2

We apply Pythagoras Theorem to the bigger triangle to get;

(4+x)^2=8^2+r^2

This implies that;

(4+x)^2=8^2+x^2+48

x^2+8x+16=64+x^2+48

x^2-x^2+8x=64+48-16

8x=96

x=12

QUESTION 5

Let the height of this triangle be c.

Then; c^2+9^2=12^2

c^2+81=144

c^2=144-81

c^2=63

Let the hypotenuse of the right triangle with sides x,c be j.

Then;

j^2=c^2+x^2

j^2=63+x^2

We apply Pythagoras Theorem to the bigger right triangle to obtain;

(x+9)^2=j^2+12^2

(x+9)^2=63+x^2+12^2

x^2+18x+81=63+x^2+144

x^2-x^2+18x=63+144-81

18x=126

x=7

QUESTION 6

Let the height be g.

Then;

g^2+3^2=x^2

g^2=x^2-9

Let the hypotenuse of the triangle with sides g,24, be b.

Then

b^2=24^2+g^2

b^2=24^2+x^2-9

b^2=576+x^2-9

b^2=x^2+567

We apply Pythagaoras Theorem to the bigger right triangle to get;

x^2+b^2=27^2

This implies that;

x^2+x^2+567=27^2

x^2+x^2+567=729

x^2+x^2=729-567

2x^2=162

x^2=81

Take the positive square root of both sides.

x=\sqrt{81}

x=9

QUESTION 7

Let the hypotenuse of the smaller right triangle be; n.

Then;

n^2=x^2+2^2

n^2=x^2+4

Let f be the hypotenuse of the right triangle with sides 2,(x+3), be f.

Then;

f^2=2^2+(x+3)^2

f^2=4+(x+3)^2

We apply Pythagoras Theorem to the bigger right triangle to get;

(2x+3)^2=f^2+n^2

(2x+3)^2=4+(x+3)^2+x^2+4

4x^2+12x+9=4+x^2+6x+9+x^2+4

4x^2-2x^2+12x-6x=4+9+4-9

2x^2+6x-8=0

x^2+3x-4=0

(x-1)(x+4)=0

x=1,x=-4

 We are dealing with length.

\therefore x=1

QUESTION 8.

We apply the leg theorem to obtain;

x(x+5)=6^2

x^2+5x=36

x^2+5x-36=0

(x+9)(x-4)=0

x=-9,x=4

We discard the negative value;

\therefore x=4

QUESTION 9;

We apply the leg theorem again;

10^2=x(x+15)

100=x^2+15x

x^2+15x-100=0

Factor;

(x-5)(x+20)=0

x=5,x=-20

Discard the negative value;

x=5

QUESTION 10

According to the leg theorem;

The length of a leg of a right triangle is the geometric mean of the lengths of the hypotenuse and the portion of the hypotenuse adjacent to that leg.

We apply the leg theorem to get;

8^2=16x

64=16x

x=4 units.

QUESTION 11

See attachment

Question 12

See attachment

6 0
4 years ago
I will mark brainliest for the right answer with a description that helps me on how to actually solve this please
deff fn [24]

Answer:

$126

Step-by-step explanation:

I divided the figure in 3 parts, 1 triangle and 2 rectangles

found the area of each figure and added all to find the total area

8 0
3 years ago
Juan spent $9.49 on school supplies. He spent $1.59 on pencils, twice that much on pens, and the rest on highlighters. How much
Artemon [7]

Answer:

$4.72

Step-by-step explanation:

9.49 - 1.59 - 1.59x2 = $4.72

5 0
4 years ago
30 point!!!! Help me fast!!!PLS!!Question is attached!!!
babymother [125]

<u>Answer:</u>

<em>This is an extremely easy question bro!</em>

1. 3²

2. 3 (Base) ² (Exponent)

3. Expanded form: (9 * 1)

   Standard form: 9

<u>Step-by-step explanation:</u>

Well, there's none.

<h2>Please mark me as Brainliest! Thanks! :)</h2>
8 0
2 years ago
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What is 3.9 rounded to the nearest whole number?
Naya [18.7K]

Answer:

4

Step-by-step explanation:

7 0
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