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densk [106]
2 years ago
15

Find the total surface and each pyramid. Round to the sea SHOW YOUR WORK!

Mathematics
1 answer:
Colt1911 [192]2 years ago
8 0

Answer:

328 square inches

PLZ MARK AS BRAINLIEST

Step-by-step explanation:

Lateral Area of Pyramid:

L = 1/2P<em>l</em>

<em>l</em> = 15.9

P = 2(8.2) + 2(8.2) = 32.8

L = 1/2(32.8)(15.9) = 260.76

Surface Area:

SA = B + L

B = (8.2)(8.2) = 67.24

L = 1/2(32.8)(15.9) = 260.76

SA = 67.24 + 260.76 = 328

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The equation of a circle C, with centre O, is:
Nataliya [291]

Answer:

a) The center coordinates O is  (0,0)

b) The radius C = 15

Step-by-step explanation:

The given equation of the circle is : x^{2}  +  y^{2}  = 225

Now, general form of the equation of the circle is:

(x-h)^{2}  + (y - k)^{2}   = r^{2}

where (h,k) are the center co -ordinates and r is the radius of the circle.

Comparing the general equation with the given equation, we get

(x-0)^{2}  + (y - 0)^{2}   = (15)^{2}

So, here the center coordinates (h,k) = (0,0)

And the radius of the given circle is r = 15

8 0
3 years ago
HELP ASAP!!!!!!
WARRIOR [948]

Answer:

x=26

C = 91

Step-by-step explanation:

The sum of the angles of a triangle add to 180 degrees

A + B+ C = 180

35+ 52+ 3(x+5) = 180

Distribute

35+52+3x+15 = 180

Combine like terms

102 +3x = 180

Subtract 102 from each side

102-102 +3x=180-102

3x= 78

Divide by 3

3x/3 = 78/3

x=26

Now we need to find angle C

c = 3(x+5)

C = 3(26+5)

     3(31)

     93

6 0
3 years ago
Penelope has a cookie recipe that makes 1-dozen cookies and requires the following dry ingredients.
spin [16.1K]

Answer:

Answer 5 1/4

Step-by-step explanation:

4 0
3 years ago
How do you know if the question is asking for you to do Pythagoras or Trigonometry? Like in basic terms, what’s the difference??
mrs_skeptik [129]

Pythagoras theorem only works for right triangle (90 degree)

Trigonometry (sin, cos, tan) works everywhere!

Hopefully I answered your question!

If you want to learn more about Trigonometry or Pythagoras theorem, send me a message and add me as friend on Brainly. I'm a mathematician and an astrophysicist

:) have a great day!

7 0
3 years ago
What is the 7-intercept of 2x-4y=12
Bingel [31]

Answer:

-3

Step-by-step explanation:

2x - 4y = 12

4y = 2x - 12

y = ½x - 3

Y intercept is -3

X intercept is 6

8 0
3 years ago
Read 2 more answers
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