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3 years ago

Jake drew this sketch of his triangular rock garden. What is the area of his rock garden?

Mathematics

2 answers:

Oksanka [162]3 years ago

8 0

Answer:

It’s either 30ft or 30ft^2

Charra [1.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

To find the area of a triangle you have to multiply base by height base is 12 and height is 5 so you do 12 x 5 = 60! :) hope this helps

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Find the surface area of a pentagon-based pyramid with slant height of 11 m.

Ronch [10]

Answer:

108.75 square meter.

Step-by-step explanation:

<h3>Surface area of pentagon based pyramid:</h3>

$\sf \boxed{\text{\bf Surface area of pentagonal pyramid = $ \bf \dfrac{5}{2}*b*(a + s)$}}$

Here, b is the base length of the pyramid. b = 3 m

a is the apothem of the pyramid. a = 3.5 m

s is the slant height of the pyramid. s = 11 m

$\sf Surface \ area = \dfrac{5}{2}*3*(11 + 3.5)$

$\sf = \dfrac{5}{2}*3*14.5\\\\ = 108.75 \ m^2$

5 0

1 year ago

What is the value of y?

coldgirl [10]

<em>Note: You forgot to add the diagram, so I found the missing diagram and attached below, based on which I am solving your query. Hopefully, it would clear your concepts anyways.</em>

<em />

Answer:

Option B is correct, as $\boxed{y=6\sqrt{3}}$

Step-by-step explanation:

From the attached figure,

Δ $MTU$ is a right triangle.

Applying Pythagoras theorem,

$TM^2=TU^2+MU^2$

$\left(6\right)^2=TU^2+\left(3\right)^2$

$\left(6\right)^2-\left(3\right)^2\:=TU^2$

switching sides

$TU^2=\left(6\right)^2-\left(3\right)^2\:$

$TU^2=36-9$

$TU^2=27$

Note that Δ $NTU$ s also right triangle.

$\:NT^2\:=\:TU^2\:+\:NU^2$

$=27\:+\:9^2$ ∵ $TU^2=27$

$=108$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$NT=\sqrt{108},\:NT=-\sqrt{108}$

But length of a side can not be negative, so ignore the negative solution.

$NT=\sqrt{108}$

$y=6\sqrt{3}$ ∵ $NT = y$

Therefore, option B is correct, as $\boxed{y=6\sqrt{3}}$

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3 years ago

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Solve for x plz.aaaa

expeople1 [14]

Answer:

I am sorry I can't give you the answer. However, I know something that may help you. It is called Symbolab. It's a calculator for equations. I hope it helps you out. Again, I am sorry I couldn't give you the answer.

Step-by-step explanation:

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3 years ago

If y varies directly as x, and y = 64 when x = 8. Find y when x = 12

svetoff [14.1K]

Use the proportion 8/64 = 12/y. Cross multiply to get 8y = 768. Divide both sides by 8 to get y=96

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3 years ago

Jason placed a mirror on the ground 40 feet from the base of the tree. He walks backwards until he can see the top of the tree i

Nady [450]

Well how many feet is he from the image

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3 years ago

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