2 years ago

PLEASEEEE HELP ITS A TEST (Rachel is setting up tables for a party. Three of the tables are covered with red tablecloths, and

Mathematics

1 answer:

Olenka [21]2 years ago

7 0

Answer:

3/15 is the answer.

Step-by-step explanation:

you add all the tables together and that is your denominator.There are three red tables so the probability is 3/15.

Please mark me the brainliest,5 stars, and a thanks!Have a great day!

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Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

gregori [183]

Answer:

81 cm²

Step-by-step explanation:

Since, the lateral face of a triangular pyramid is a triangle,

Given,

The base edge or the base of one lateral face of pyramid, a = 6 cm,

And, the slant height or the height of the face, k = 9 cm,

Thus, the area of one lateral face of the pyramid,

$A=\frac{1}{2}\times a\times k$

$=\frac{1}{2}\times 6\times 9$

$=\frac{54}{2}$

$=27\text{ square cm}$

We know that, a Regular triangular pyramid has 3 lateral faces,

Hence, the total lateral area of the pyramid,

$L.A.=3\times\text{ The area of one lateral face}$

$=3\times 27$

$=81\text{ square cm}$

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3 years ago

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Which expression is NOT an expression equivalent to (32) (2) (33)? Select all that apply.

max2010maxim [7]

I think is OB, I’m not too sure tho

7 0

3 years ago

How do you find 1/2n+3<5

alina1380 [7]

n < 1

Hope this helps! :)

7 0

3 years ago

There are 20 boys in Mrs. Shaw’s 3rd-period class. 11 of the boys are from Benignus. What percent of the boys came from Benignus

o-na [289]

11/20 times 100% = 55%

3 0

3 years ago

Mary has a cone that has a radius of 5cm and height of 10cm. James has a square pyramid with base length of 10cm and height of 5

lukranit [14]

Answer: The cone has a larger volume.

Step-by-step explanation:

Volume of a cone = ⅓πr²h

where, radius = 5cm

height = 10cm

Volume = ⅓ × 3.142 × 5² × 10

Volume of cone = 261.83cm³

Volume of square pyramid = A(h/3)

where, A = 10 × 10 = 100cm²

Volume = 100 × (5/3)

Volume of square pyramid = 166.67cm³

Therefore, the cone has a larger volume.

5 0

2 years ago