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3 years ago

Help please soon help

Mathematics

1 answer:

user100 [1]3 years ago

4 0

Answer:

for the first one t (less than or equal to sign)40 degrees Fahrenheit

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Let {u1,u2,u3} be an orthonormal basis for an inner product space V. If

dybincka [34]

• ||v|| = 42, which is to say

||v||² = 〈v, v 〉

… = 〈a u₁ + b u₂ + c u₃, a u₁ + b u₂ + c u₃〉

… = a ² 〈u₁, u₁〉 + b ² 〈u₂, u₂〉 + c ² 〈u₃, u₃〉 + 2(ab 〈u₁, u₂〉 + ac 〈u₁, u₃〉 + bc 〈u₂, u₃〉)

… = a ² ||u₁||² + b ² ||u₂||² + c ² ||u₃||²

[since each vector in the basis for V is orthogonal to any other vector in the basis, and 〈x, x〉 = ||x||² for any vector x ]

42² = a ² + b ² + c ²

[since each vector in the basis has unit length]

42 = √(a ² + b ² + c ²)

• v is orthogonal to u₃, so 〈v, u₃〉 = 0. Expanding v gives the relation

〈v, u₃〉 = 〈a u₁ + b u₂ + c u₃, u₃〉

… = a 〈u₁, u₃〉 + b 〈u₂, u₃〉 + c 〈u₃, u₃〉

… = c ||u₃||²

… = c

which gives c = 0, and so

42 = √(a ² + b ²)

• Lastly, 〈v, u₂〉 = -42, which means

〈v, u₂〉 = 〈a u₁ + b u₂ + c u₃, u₂〉

… = a 〈u₁, u₂〉 + b 〈u₂, u₂〉 + c 〈u₃, u₂〉

… = b ||u₂||²

… = b

so that b = -42. Then

42 = √(a ² + (-42)²) → a = 0

So we have a = 0, b = -42, and c = 0.

7 0

3 years ago

1/2 divided by 3 please help me find the answer

Reil [10]

Answer:

7/15

Step-by-step explanation:

4 0

3 years ago

Find the circumference of the circle. Use 3.14 or 22/7 for pi. Radius of 3 feet

BabaBlast [244]

Answer:

18.85

Step-by-step explanation:

Cause its true

5 0

3 years ago

Students took two parts of a test, each worth 50 points. Part A has a variance of 25, and Part B has a variance of 36. The corre

Leona [35]

Answer:

Following are the solution to the given choices:

Step-by-step explanation:

In point a:

Calculating the variance of the test grade:

$\to var(A+B)=var A + var B + 2 cov(A,B)$

$=25+36+2(0.8)\\\\=25+36+1.6\\\\=62.6$

In point b:

$\to var(A-B)=varA + var B - 2 cov(A,B)$

$=25+36-2(0.8)\\\\=25+36-1.6\\\\=59.4$

The relationship between the top 20 students is also slight, so the top 20 students are more university-like than all secondary students.

7 0

3 years ago

Select the correct answer from the drop-down menu.

grin007 [14]

Answer:

374

Step-by-step explanation:

11/50=0.22

number/1700=0.22

so 374/1700=0.22 hope that's a choice and helps.

7 0

3 years ago