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Galina-37 [17]
3 years ago
12

. A mason has 7,758 bricks that he needs to share equally among 9 different building sites. How many

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
3 0

Why does he have bricks .

choli [55]3 years ago
3 0

Answer:

862

Step-by-step explanation:

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If we let x be the speed of the boat you are taking to the island (the steamboat), then we know that the speed of the other boat (the tall ship) is 10 knots less than the steamboat's. So the speed of the tall ship (for the return trip) is (x - 10) knots.


8 0
3 years ago
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Let: u, v, w \varepsilon R3<br><br> Prove: (u x v) * [(v x w) x (w x u)] = [u * (v x w)]2
sweet [91]

Recall that for 3 vectors a,b,c, all in \mathbb R^3, the vector triple product

a\times(b\times c)=(a\cdot c)b-(a\cdot b)c

So

(v\times w)\times(w\times u)=((v\times w)\cdot u)w-((v\times w)\cdot w)u

Also recall the scalar triple product,

a\cdot(b\times c)

which gives the signed volume of the parallelipiped generated by the three vectors a,b,c. When either a=b or a=c, the parallelipepid is degenerate and has 0 volume, so

(v\times w)\cdot w=0

and the above reduces to

(v\times w)\times(w\times u)=((v\times w)\cdot u)w

so that

(u\times v)\cdot[(v\times w)\times(w\times u)]=(u\times v)\cdot((v\times w)\cdot u)w

The scalar triple product has the following property:

a\cdot(b\times c)=b\cdot(c\times a)=c\cdot(a\times b)

Since (v\times w)\cdot u is a scalar, we can factor it out to get

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and by the property above we have

(u\times v)\cdot w=u\cdot(v\times w)

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4 0
3 years ago
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Step-by-step explanation:

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(\sqrt{3} )² = 3

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Henry took his daughter and some friends to the fair.he bought 1 adult ticket for $11, and, n, child tickets for 10 each. He spe
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Answer: 1+$11=$12

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If m∠ABD= 48 and m m∠DBC= 78 find m∠ABC
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