Mathematics High School

Two vectors with magnitudes of 6 and 9 have a dot product equal to –27. Find the angle between the vectors.

Answers

Answer 1

Answer:

120°

Step-by-step explanation:

From the question,

The expression for the dot product of two vector is given as

a.b = abcosθ................... Equation 1

make θ the subject of the equation

θ =cos⁻¹ (a.b/ab)......................... Equation 2

Where θ = angle between the vector.

Given: a.b = -27, a = 6, b = 9

Substitute these values into equation 2

θ = cos⁻¹[-27/(6×9)]

θ = cos⁻¹(-27/54)

θ = cos⁻¹(-0.5)

θ = 120°.

Hence the angle between the vector is 120°

Answer 2

Answer:

B

Step-by-step explanation:

Edge 2021

Related Questions

Evaluate the expression when a = 3 and y=-3.
-a +6y

Answers

-3+6(3)=15
answer: 15

Someone plz help me !
Giving brainliest

Answers

Answer:

(6,3)

Step-by-step explanation:

It will make a weird diamond shape.

Answer:

(6,3)

Step-by-step explanation:

A rhombus lis like a diamond shape so we know its going to be opposite if point B.

Point B is located 3 units above the invisible line that connects A and C.

Count down 3 units from that line and you will get your answer.

Hope this Helps!

:)


[tex] \sqrt{64} } [/tex]
​

Answers

Answer:

8 is your answer ^_^

Step-by-step explanation:

Round : 9198.10666667
to the nearest hundredth

Answers

Answer:

9198.17

Step-by-step explanation:

Answer:

9198.11

Step-by-step explanation:

;) the zero becomes a 1 since next number 6 (above 5)

Don Pedro tenía una parcela de 10 hectareas, vendió la quinta parte y el resto lo dividió entre sus 4 hijos, cuantas hectareas recibió cada uno?

Answers

what do i need for u supposed to help them

what is x worth in 8(-6x + 14) = -128

Answers

Answer:

5

Step-by-step explanation:

SOS PLEASE HELP write the equation for this line​

Answers

Answer:

y = - x + 3

or

x + y = 3

Step-by-step explanation:

Line is passing through the points (3, 0) & (0, 3)

y-intercept (b) = 3

Slope of the line (m) = (3 - 0)/(0 - 3) = 3/(-3) = - 1

Now, required equation of line is given as:

y = mx + b

y = - 1*x + 3

y = - x + 3

or

x + y = 3

8x-29 + 6x-11 + 3x-1 solve for x

Answers

Answer:

Step-by-step explanation:

I need help on this too.

Answer:

8x-29 + 6x-11 + 3x-1=180

Answer: 180

Step-by-step explanation:

a boy walks x meter in 6 min. how many meter can he walk in 1 hour​

Answers

Answer:

10x I think

cause X divide by 6 is X/6

then X/6 x 60min(1h) is 60x/6 which is 10x

hope this helps:))

How do I find measures to interior angles

Answers

Answer:

Just add all the angles together, and see if they add up to 180 degrees

Hope this helped! Have a nice day! Plz mark as brainliest!!! :D

-XxDeathshotxX

2. Solve for b.
(a - 3)

Answers

Answer:

Step-by-step explanation:

Sum of angles inside triangle is 180

b + (a -3) + 90 =180

b + a - 3 + 90 = 180

b + a +  87 = 180

b + a +  87 -87 = 180-87

b + a  = 180-87

b + a  = 93

b = 93 -a

Decide whether each equation is true for all, one, or no values of x.

​

Answers

Solution:

1) 6x - 4 = -4 + 6x

6x -6x = -4+4

0 = 0

ans - true

2) 4x -6 = 4x + 3

4x-4x = 3+6

0 = 9

Ans - false

3) -2x+4=-3x+4

-2x + 3x = 4 - 4

x = 0

ans - false

A weather station on the top of a mountain reports that the temperature is currently 0 and has been falling at a constant rate of 3 degrees per hour. Find each temperature.

What was the temperature:

1 hour ago? degrees

3 hours ago? degrees

Answers

Answer:

Step-by-step explanation:

hola my friend

Sarah used 2.5 cups of cheese in a dish that serves 10 people. Amyn used 1.6 cups of cheese in a dish that serves 8. How much more cheese is in one serving of Sarah's dish?

Answers


0.5 cups of cheese

Amy: 1.6 divided by 8 = 0.2 cups of cheese per serving

Sarah: 2.5 divided by 10 = 0.25 cups of cheese per serving

0.25 - 0.2 = 0.5

A store pays $24 for a jewelry box and marks the price up by 20%. What is the amount of
the mark-up?

Answers

Answer:

$4.8

Step-by-step explanation:

$24×20/100=$4.8

Help ASAP!!!!!!!!!!!

Answers

Answer:

- 1/2

Step-by-step explanation:

In order to find a slope intercept we need to use,

Equation : y= mx + b to find the slope (m)

Determine the volume of the entire Charter School.​11 points

Answers

Answer:   512m³

Step-by-step explanation:

v = whl

The volume for left building:

v = w x h x l

v = 4 x 10 x 8

v = 320 m³

The volume for right and lower building:

v = w x h x l

v = 8 x 4 x 6

v = 192 m³

The total volume for the entire Charter School is: 320m³ + 192m³ = 512m³

Tom has 50 coins consisting of quarters and dimes. The combined value of coins is $8.30. How many dimes and quarters does Tom have:
dimes
quarters

Answers

Answer:

thirty two quarters and three dimes

Hi, can someone help me with my math homework? I just need help with number C.

Answers

Answer:

She left, 875

Step-by-step explanation:

She are 3/4 of berries then She left 1/4 to jelly

[tex] \frac{1}{4} \times 3.5 = .875[/tex]

If you need any explanation in it or anything on math you can communicate with me on Whats on this number +201557831028 or in email or face or anything

Answer:

total pints= 7/2

Ate 3/4 of 7/2 which is 3/4×7/2 = 21/8

left 1/4 of 7/2 which is 1/4×7/2 = 7/8

answer= 7/8

HELP WHAT PERCENT IS THE SALES TAX????

Answers

Answer:

first one is 6 cents(6 percent) second one 14 cents (14%)

Step-by-step explanation:

is just didviding them

I have to find the area of this rectangular prism pls help!!

Answers

Answer:

the surface area is 208

Step-by-step explanation:

formula for surface area is A = 2 (w*l + h*l + h*w )

A = 2 ( 4*8 + 6*8 + 6*4 )

A = 2 ( 32 + 48 + 24 )

A = 2 ( 104 )

A = 208

1. For the exponential function y = 2^x:
a) What is the y-intercept?
b) What is the domain?
c) What is the range?
d) What is the equation of the asymptote?
PLEASE HELP EXPONENTIAL FUNCTION!!

Answers

Answer:

D

Step-by-step explanation:

pajsoajssksksjsnsjeieueisjehedie

Will give brainiest to correct answer


40x + 45

Answers

Answer:

x= 1.125

Step-by-step explanation:

first we want to get the variable by itself so divide

just divide 45 by 40

1.125 is the answer

HALLPPPPPP PLEASEEE!!

Answers

I think right scalene

Chris says that the expression 4n - 2 can be written as 2(2n - 1). Do you agree? Explain your answer.

Answers

Answer:

Correct

Step-by-step explanation:

The given expression is : 4n - 2

Chris says that the expression (4n-2) can be written as 2(2n - 1).

Taking 2 common on the given expression.

(4n-2) = 2(2n-1)

Hence, he has wrote it in a correct way.

A store pays a supplier $40.00 for a wagon. The store sells the wagon for $70.00. What is the markup rate?​

Answers

Answer:

markup 75%

Step-by-step explanation:

The difference in prices is $70-$40=$30.

So, we need to find what percentage of 40 is 30. We do this by dividing: 30/40=0.75, which is 75%. So, the markup is 75%.

2 (3x - 5) + 4 = -18


Solve for 20 Points

Answers

Answer:

x = -2

Step-by-step explanation:

2(3x - 5) + 4 = -18

Distribute the 2

6x - 10 + 4 = -18

6x - 6 = -18

Add 6 to both sides

6x = -12

Divide both sides by 6

x = -2

Check:

2(3x - 5) + 4 = -18

substitute x = -2 into the original equation

2(3(-2) - 5) + 4 = -18

2(-6 - 5) + 4 = -18

2(-11) + 4 = -18

-22 + 4 = -18

-18 = -18

So x = -2 is true.

Answer:

x=-2

Step-by-step explanation:

2(3x-5)+4=-18

We move all terms to the left:

2(3x-5)+4-(-18)=0

We add all the numbers together, and all the variables

2(3x-5)+22=0

We multiply parentheses

6x-10+22=0

We add all the numbers together, and all the variables

6x+12=0

We move all terms containing x to the left, all other terms to the right

6x=-12

x=-12/6

x=-2

Solve for all values of x by factoring. x2 – 11x + 5 = -6x + 5​

Answers

Answer:

x = 0,5

Step-by-step explanation:

Factor and set each factor equal to 0.

For each pair of pants, Pedro has 2 shirts. Which models show this relationship? Check all that apply.

Answers

Step-by-step explanation:

Given - For each pair of pants, Pedro has 2 shirts.

To find - Which models show this relationship?

Proof -

Let Pedro has total number of pair of pants = x

Now,

As given

For 1 pair of pants , Pedro has total number of shirts = 2

⇒For x pair of pants , total number of shirts = 2x

So, Total number of clothes Pedro has = x + 2x = 3x

Answer:it’s A and D

Hope this helped

Express 150 as:
a) A fraction of 350.
b) A percentage of 600.

Answers

A) 3/7 and B) 25%. Give me a like if I helped please :)

Answer:

a)3/7

b)25%

Step-by-step explanation:

Other Questions
1/4 equals Z /20 what does z equal What did the Sedition Act allow the US government to do? Helppp!!!!! Please!!A 0.144 kg baseball approaches a batter with a speed of 20m/s . The batter lines the ball directly back to the pitcher with a speed of 30m/s . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat???? A suitcase is discounted 40 % off the original price, p . Which expression represents the price of the suitcase with the discount? Where does blood go after it leaves the pulmonary veins? If Ava drops a 5 kg ball off a 20 meter building and Clayton drops a 5 kg balloff a 40 meter building, which ball will have more potential energy?"A.Ava's ballB.Clayton's ball What is asymptom of test anxiety?A. Increased appetiteB. ConfidenceC. RelaxationD. Headaches Which of the following is a skill?A. HearingB. ReadingOC. TalkingO D. Sitting [tex] \frac{?}{32} = \frac{25}{100} [/tex]fill in the blank URGENT !!!!!!!!! Please answer correctly !!!!! Will be marking Brianliest !!!!!!!!!!!!!!!! Because we are working with a film transcript for this unit, you should only gather quotations for your Golden Quotation Collections that consist ofcharacter dialogue.TrueFalse A train travels 1 kilometre in 1 minute 20 seconds. Picture of steam train Question prompt At this rate, how many kilometres will the train travel in 1 hour? What is the main idea of the " Wild Entertainment" section? HELP PLEASE!!Which of the following equations is true to find the length BC? Sandras team is falling apart. Look back at what the team members have had to say so far. Using the four phases of The Team Clock, determine what areas the team is struggling with. Write your impression of Sandras team, including supporting examples from the case study and phases of The Team Clock, in a paragraph of at least five sentences. Submit your final paragraph for grading. 50 POINTSS i will give brainlest to best helper:Write a 200 word essay about genghis khan In your own words, explain the motivation of slaves in the civil war. the map shows the average high temperatures in July for two cities in Texas. What is the most likely explanation for the difference in average high temperatures in July for these two cities?A-Galveston is exposed to westerly winds, while Del Rio is exposed to easterly winds.B-Warm ocean water off Galveston radiates more heat than the desert near Del Rio C-Galveston receives less rainfall because it is near the ocean, while Del Rio receives more rainfall because it is inland.D-Ocean breezes keep coastal Galveston cooler than Del Rio, which is inland and exposed to southerly winds. Expand t (4t - 4 ) answer if you can plz The ratio of marbles to stones in a large pot is 6 to 7. If there are 42 marbles, then how many stones are there?