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3 years ago

8

Find the surface area of the pyramid. The faces of the triangular pyramid are equilateral triangles 34.6 mm 40 mm 40 mm The surf

ace area is?

1 answer:

ollegr [7]3 years ago

8 0

Answer:

would you still like me to help you with this problem?

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What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the

marishachu [46]

The sum of all the measurements is just the average times the number.

$\bar x = \frac{1}{n} \sum_{i=1}^n x_i$

$\sum_{i=1}^n x_i = n \bar x$

So if the average of all 92 is 7 the sum of those is $92 \times 7$

The average of the last two is 7.2 so their sum is $2 \times 7.2$

That means the sum of the first 90 is $92 \times 7 - 2 \times 7.2$

so the average of the first 90 is

$\dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556$ cm

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3 years ago

Barbara can walk 3,200 meters in 24 meters. Mavis can walk 11,808 feet in 24 minutes. Who walks faster rate of speed? Explain th

grin007 [14]

I used a converter so i put 3200 meters into feet which was 10,498.69 and i rounded it to 10,498 and then i subtract 10,498 feet from 11,808 feet and got 1,310 feet as the answer

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3 years ago

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If f(x) = x^2 - 3x + 1 over 2, determine f ( 4 ) .

svet-max [94.6K]

F(x)=x^2-3x+1/2, if f(4)
Substitute x with 4, to get
f(x)=x^2-3x+1/2
f(4)=4^2-3(4)+1/2
f(4)=16-12+1/2
f(4)=4+1/2
f(4)=4 1/2 or 4.5. Hope it help!

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3 years ago

There are 5 roses for every 9 carnations in a bouquet. Mr.Rodriguez buys a bouquet with 42 flowers in it. How many carnations ar

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I think its eight but I could be wrong

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A company was able to increase its staff from 127 employees to 204

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The percentage increase in staff was 60.6%.

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