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2 years ago

Please help and if you dont know please don't answer

Mathematics

2 answers:

quester [9]2 years ago

8 0

The answer is 81 centimeters

Allisa [31]2 years ago

5 0

Answer:

81cm

Step-by-step explanation:

15cm + 20cm + 21cm + 25cm = 81cm

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One of the legs of a right triangle is 9 cm. If the area of the triangle is 225 cm², then the length of the other leg is

ioda

Given:

One of the legs of a right triangle is 9 cm.

The area of the triangle is 225 cm².

To find:

The length of the other leg.

Solution:

The area of a triangle is

$Area=\dfrac{1}{2}\times Base\times Height$

The area of a right triangle is

$Area=\dfrac{1}{2}\times (leg_1)\times (leg_2)$

Let x be the length of other leg.

$225=\dfrac{1}{2}\times (9)\times (x)$

$2\times 225=9x$

$\dfrac{450}{9}=x$

$50=x$

Therefore, the length of the other leg is 50 cm.

4 0

3 years ago

What is the area and yard of 15 and 4

weeeeeb [17]

Answer:

The area and yard is 60.

Step-by-step explanation:

15 x 4 = 60

Let me know if that helps!

3 0

2 years ago

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Alex17521 [72]

Answer:

100/100

Step-by-step explanation:

3 0

3 years ago

Unicorns can live forever but they remain children for 261 months. How many years is that in total?

11111nata11111 [884]

Answer:

21.75 years (Almost 22 years)

21 years and 9 months. :)

Step-by-step explanation:

There are 12 months in a year.

261/12 = 21.75

.75 = 3/4

3/4(12) = 9 months

Hope that helps!

6 0

2 years ago

Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq

azamat

Answer:

The perimeter of rectangle is $18\ cm$

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

$x=y+5$ ----> equation A

$120=xy+2x^{2}+2y^{2}$ ---> equation B (area of the constructed figure)

substitute the equation A in equation B

$120=(y+5)y+2(y+5)^{2}+2y^{2}$

$120=(y+5)y+2(y+5)^{2}+2y^{2}\\ 120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\ 120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\120=5y^{2}+25y+50\\5y^{2}+25y-70=0$

using a graphing calculator -----> solve the quadratic equation

The solution is

$y=2\ cm$

Find the value of x

$x=y+5 ----> x=2+5=7\ cm$

Find the perimeter of rectangle

$P=2(x+y)=2(7+2)=18\ cm$

8 0

3 years ago