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Scorpion4ik [409]
4 years ago
13

Simplify the ratio 9:15

Mathematics
2 answers:
denis23 [38]4 years ago
7 0
9:15

9÷3:15÷3

3:5
----------------------------------------------------
german4 years ago
7 0
9/15 \\ =(3*3)/(5*3) \\ =3/5
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Find two unit vectors orthogonal to a=⟨−2,−4,−2⟩a=⟨−2,−4,−2⟩ and b=⟨−3,5,2⟩b=⟨−3,5,2⟩ Enter your answer so that the first non-ze
Levart [38]

Answer:

u₁= ⟨1/(7*√3),−5/(7*√3) ,−11/(7*√3)⟩

u₂= ⟨-1/(7*√3),5/(7*√3) ,11/(7*√3)⟩

Step-by-step explanation:

for  a=⟨−2,−4,−2⟩ and b=⟨−3,5,2⟩

a vector orthogonal to a and b can be found through the vectorial product of a and b. Thus

c= a x bc=\left[\begin{array}{ccc}i&j&k\\-2&-4&-2\\-3&5&2\end{array}\right] =  \left[\begin{array}{ccc}-4&-2\\5&2\end{array}\right]*i+\left[\begin{array}{ccc}-2&-2\\-3&2\end{array}\right]*j+\left[\begin{array}{ccc}-2&-4\\-3&5\end{array}\right]*k = 2*i  -10*j  - 22*k

then c₁=⟨2,−10,−22⟩ and c₂= - c₁= ⟨-2,10,22⟩ are orthogonal to a and b

the corresponding unit vectors are

u₁=c₁/|c₁| = ⟨2,−10,−22⟩ / √(2²+(−10)²+(−22)²) = ⟨2,−10,−22⟩/(14*√3) =  ⟨1/(7*√3),−5/(7*√3) ,−11/(7*√3)⟩

then u₂= - u₁=  ⟨-1/(7*√3),5/(7*√3) ,11/(7*√3)⟩

then the unit vectors are

u₁= ⟨1/(7*√3),−5/(7*√3) ,−11/(7*√3)⟩

u₂= ⟨-1/(7*√3),5/(7*√3) ,11/(7*√3)⟩

7 0
4 years ago
The students at Central Elementary School are planning a dinner for their parents.
blsea [12.9K]
They will need 20 pans
5 0
3 years ago
(200-50) + 50 * 2 in hurry
Neko [114]

Answer: 400

Step-by-step explanation:

200-50=150+50=200*2=400

Are you just posting your questions for an assignment?

5 0
3 years ago
Read 2 more answers
A Nike shoe factory uses 3.5 lbs of leather to make four pairs of shoes.At this rate How many pairs of shoes will 5.25 lbs of le
Gre4nikov [31]

Answer:

6 pairs

Step-by-step explanation:

It is given

3.5 lbs = 4 pair

We want to know:

5.25 lb = HOW MANY PAIR? (let this be x)

Now, we can write two ratios and equate them, cross multiply and find x(the pair of shoes that can be made with 5.25 pounds of leather). The ratios and algebra is shown below:

\frac{3.5}{4}=\frac{5.25}{x}\\3.5x=4*5.25\\3.5x=21\\x=\frac{21}{3.5}\\x=6

Thus,

with 5.25 lbs of leather, 6 pairs can be made

6 0
3 years ago
23/100 converted to a decimal
Nitella [24]
23/100 as a decimal is 0.23
8 0
3 years ago
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