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Gelneren [198K]
3 years ago
11

Find the surface area of a triangular pyramid.

Mathematics
1 answer:
rusak2 [61]3 years ago
6 0

Answer:

91in^2

Step-by-step explanation:

SA of base =  7x7 = 49in^2

SA of each triangle = 1/2 x 7 x 3 = 10.5in^2

SA of all 4 triangles = 10.5 x 4 = 42in^2

SA Total = 49 + 42.= 91inch^2

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Jodi is cutting out pieces of paper that measure 8 1/2 inches by 11 inches from a larger sheet of paper that has an area of 1000
jolli1 [7]
8 1/2 or 8.5 x11 = 93.5 square inches thus,
1000 square inches divided by 93.5 square inches
1000/93.5 ~10.695
that mean that Jodi can cut out about 10 pieces of paper measuring 8 1/2 x 11 inches.
4 0
3 years ago
Place the numbers in ascending order.
frutty [35]

Answer:

in question it say descending order and you say ascending order what to do ?

in deceasing order

√23

180%

1 2/7,

√49/7,

π-5

this is the correct answer

7 0
3 years ago
Combine the terms in the given polynomial then evaluate for x=3, and y=-1
Novay_Z [31]
Answer:xy^2+3x^2y;\text{  -24}

Explanation:

The given expression is:

xy+3xy^2-2xy+3x^2y-2xy^2+xy

Combine like terms

xy+xy-2xy+3xy^2-2xy^2+3x^2y

Simplify the resulting expression

\begin{gathered} 2xy-2xy+3xy^2-2xy^2+3x^2y \\  \\ xy^2+3x^2y \end{gathered}

Substitute x = 3 and y = -1 into the simplified expression

\begin{gathered} xy^2+3x^2y \\  \\ 3(-1)^2+3(3)^2(-1) \\  \\ 3(1)+(-27) \\  \\ 3-27 \\  \\ =-24 \end{gathered}

6 0
1 year ago
What is the distance between the points (-3,-11 and (-3,23) in the coordinate plane?
11111nata11111 [884]
Distance= the square root of (x2-x1)^2 +(y2-y1)^2 so (-3-(-3))^2 + (23-(-11))^2= 0^2+34^2=
0+1156= 1156 and the square root of that is 34 so your final answer is 34
6 0
3 years ago
A high school held an election for class president. Exactly 1,000 votes were cast and they were all for either Gillian or Clive.
lisov135 [29]

Answer: 60%

1000÷2=500

Clive: 500-100= 400

Gillian: 500+100= 600 (Because Gillian has 100 more votes than Clive)

\frac{600}{1000} \times 100\%  = 60\%

8 0
3 years ago
Read 2 more answers
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