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2 years ago

There are 12 inches per foot. How many feet is 96 inches? Enter only the number.

Mathematics

2 answers:

Ierofanga [76]2 years ago

7 0

8, the answer needs to be more than a certain amount of characters.

tensa zangetsu [6.8K]2 years ago

6 0

<h2><u>8 feet</u> is the correct answer!</h2><h3>But just enter 8 when you put in the answer. Otherwise, you'll get it wrong.</h3><h3 /><h3>96 ÷ 12 = 8</h3><h3 /><h3><em>Please let me know if I am wrong.</em></h3>

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Show that if A is invertible, then det Upper A Superscript negative 1det A−1equals=StartFraction 1 Over det Upper A EndFraction

netineya [11]

Answer:

Therefore

$det(A)*det(A^{-1}) = 1$ and $det(A^{-1}) = 1/det(A)$

Step-by-step explanation:

Remember that if

$I$ = Identity Matrix

then $det(I)=1$ .

Also remember that for any invertible matrix

$A*A^{-1} = I =$ Identity Matrix.

Therefore

$det(A*A^{-1}) = det(A)*det(A^{-1}) = det(I) = 1$

Therefore

$det(A)*det(A^{-1}) = 1$ and $det(A^{-1}) = 1/det(A)$

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3 years ago

Please help i beg i never get these right

Anuta_ua [19.1K]

Answer:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

Step-by-step explanation:

Given

$\sin(105^o)$

Required

Solve

Using sine rule, we have:

$\sin(A + B) = \sin(A)\cos(B) + \sin(B)\cos(A)$

This gives:

$\sin(105^o) = \sin(60 + 45)$

So, we have:

$\sin(60 + 45) = \sin(60)\cos(45) + \sin(45)\cos(60)$

In radical forms, we have:

$\sin(60 + 45) = \frac{\sqrt 3}{2} * \frac{\sqrt 2}{2} + \frac{\sqrt 2}{2} * \frac{1}{2}$

$\sin(60 + 45) = \frac{\sqrt 6}{4} + \frac{\sqrt 2}{4}$

Take LCM

$\sin(60 + 45) = \frac{\sqrt 6 + \sqrt 2}{4}$

Rewrite as:

$\sin(60 + 45) = \frac{\sqrt 2 + \sqrt 6}{4}$

Hence:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

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2 years ago

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Lunna [17]

Answer: One solution

Step-by-step explanation:

V=7/9

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2 years ago

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fredd [130]

Not sure if this is correct but:

Step-by-step explanation: P = 2000

R = 5% = 0.05

n = 4

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Substitute values in the compound interest formula:

y = P ( 1 + $\frac{r}{n}$ ) $^{nt}$ .

Hope this helps..

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2 years ago

The ratio of boys to girls at a local sports club is 3 to 1 if there are 45 girls, how many boys are there

marysya [2.9K]

Answer:

135

Step-by-step explanation:

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3 years ago