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3 years ago

I don’t know if this is right, I’m stuck. Help!

Mathematics

1 answer:

STALIN [3.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

According to SohCahToa, cosine is adjacent over the hypotenuse.

The adjacent when looking from angle b, is 21.

The hypotenuse of this triangle is 29.

So Cos B=21/29

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Every year, Aunt linda spends $36 on a dozen candy bunnies for her nephews and nieces. This year, she has to buy 15 bunnies. If

AleksAgata [21]

If 12 divided by 36 is 3 then multiply 15 by 3 to get 45 as the answer

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3 years ago

Read 2 more answers

the quality rating of 8 movies showing at a movie theater near you is 5.6, 7.9, 7.0, 5.9, 7.8, 6.2, 6.4, and 5.2. What do the ni

-Dominant- [34]

Answer:

5.6

Step-by-step explanation:

Given :

Quality rating for 8 movies :

5.6, 7.9, 7.0, 5.9, 7.8, 6.2, 6.4, 5.2

Let rating for the 9th movie = x

Average quality rating olfor the 9 movies = 6.4

To find x :

Sum of all ratings / number of ratings = 6.4

(5.6 + 7.9 + 7.0 + 5.9 + 7.8 + 6.2 + 6.4 + 5.2 + x) / 9 = 6.4

(52 + x) / 9 = 6.4

52 + x = 57.6

x = 57.6 - 52

x = 5.6

4 0

3 years ago

5.01=m/1.2 solve for m

NNADVOKAT [17]

Answer:

answer is m

6.012

Step-by-step explanation:

3 0

3 years ago

HELP PICS INCLUDED! WILL GIVE BRAINLIEST! SHOW WORK AND EXPLAIN

Naddik [55]

I assume you know about the dot product, and that for two vectors $\mathbf a$ and $\mathbf b$ , the angle between them $\theta$ satisfies

$\mathbf a\cdot\mathbf b=\|\mathbf a\|\|\mathbf b\|\cos\theta\iff\cos\theta=\dfrac{\mathbf a\cdot\mathbf b}{\|\mathbf a\|\|\mathbf b\|}$

Then the vectors are parallel if the angle between them is 0 or 180 degrees (0 or pi radians), which would make $\cos\theta=1$ or $\cos\theta=-1$ , respectively.

Part A)

$\vec v_1=\langle\sqrt3,1\rangle\implies\|\vec v_1\|=\sqrt{(\sqrt3)^2+1^2}=\sqrt4=2$

$\vec v_2=\langle-\sqrt3,-1\rangle=-\vec v_1\implies\|\vec v_2\|=\|\vec v_1\|=2$

$\vec v_1\cdot\vec v_2=(\sqrt3)(-\sqrt3)+(1)(-1)=-4$

Then the angle between $\vec v_1,\vec v_2$ is such that

$\cos\theta=\dfrac{-4}{(2)(2)}=-1\implies\theta=\pi\,\mathrm{rad}$

so these vectors are parallel ("antiparallel", more specifically, which means they are parallel but point in opposite directions).

Part B) involves the same computations:

$\vec u_1=\langle2,3\rangle\implies\|\vec u_1\|=\sqrt{2^2+3^2}=\sqrt{13}$

$\vec u_2$ has the same components but differing by sign and order, as $\vec u_1$ ; its magnitude remains the same, though:

$\vec u_2=\langle-3,-2\rangle\implies\|\vec u_2\|=\sqrt{(-3)^2+(-2)^2}=\sqrt{13}$

$\vec u_1\cdot\vec u_2=(2)(-3)+(3)(-2)=-12$

$\implies\cos\theta=\dfrac{-12}{(\sqrt{13})(\sqrt{13})}=-\dfrac{12}{13}\implies\theta=\cos^{-1}\left(-\dfrac{12}{13}\right)$

which is neither 0 nor pi, which means these vectors are not parallel.

4 0

4 years ago

Morty buys and sells computer parts

mart [117]

Answer:

1. Morty's total cost for the items he purchased was $210

2. Morty's revenue from the sale of the items was $547

3. Morty's Total profit was $337

Explanation:

The complete question is:

Morty buys and sells computer parts. He bought two monitors for $25 each and later sold them for $88 each. He bought four cases for $15 each and later sold them for $24 each. He bought five memory modules for $20 each and later sold them for $55 each.

Morty's total cost for the items he purchased was

Morty's revenue from the sale of the items was

Morty's Total profit was

<h2>Solution</h2>

1. Morty's total cost for the items he purchased was

Build a table with the number of parts and their costs:

Component Amout Unit cost Total cost

$ $

Monitors 2 25 50

Cases 4 15 60

Memory 5 20 100

Total cost = $50 + $60 + $100 = $210

2. Morty's revenue from the sale of the items was

Build a table with the number of parts and their selling prices:

Component Amout Unit price Total cost

$ $

Monitors 2 88 176

Cases 4 24 96

Memory 5 55 275

Total revenue: $176 + $96 + $275 = $547

3. Morty's Total profit was 

The total profit is the total revenue less the total cost: $547 - $210 = $337.

8 0

4 years ago