1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SIZIF [17.4K]
3 years ago
7

for v= 4i - 5j, find unit vector u in the direction of v, and write your answer as a linear combination of the standard unit vec

tors i and j.

Mathematics
2 answers:
IRISSAK [1]3 years ago
8 0

Answer: I just took the test and got 100%

1. C, The vector will not change direction but will increase in magnitude.

2. C, 56 ft lbs

3. C, (-2,-3)

4. A, u = -4 sqrt 41/41 i - 5 sqrt 41/41 j

5. A, 56

6. C, 11.4 ft/sec

7. Do not copy my exact answer please (: They are equal. You know because if you take the points of each segment and subtract them, you will get the same points for both segments.

8a. A, (-10,-16)

8b. D, 2 sqrt 89

9a. C, (-14,-21)

9b. B, 7 sqrt 13

10a. C, (-18,-26)

10b. B, 10 sqrt 10

11. B, 5,144 degrees

12. A, 173 degrees

13. C, (1/6, -1/5)

14. D, 163 mph

15. C, 10j

16. D, 2 sqrt 3

17. A, 98.1 degrees

18. Do not copy my exact answer please (: The angle between the two vectors is 26.75 degrees.

Feel free to mark as brainliest (:

umka21 [38]3 years ago
4 0

Answer:

a. u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}

Step-by-step explanation:

The given vector is v= 4i - 5j

The magnitude of this vector is;

|v|=\sqrt{(-4)^2+(-5)^2}

|v|=\sqrt{16+25}

|v|=\sqrt{41}

The unit vector u in the direction of v is;

u=\frac{v}{|v|}

u=\frac{4i - 5j}{\sqrt{41}}

u=\frac{4i }{\sqrt{41}}-\frac{5j}{\sqrt{41}}

We rationalize to get

u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}

You might be interested in
X/3 -9=-12 what is x
Pavel [41]
The answer for x should be X= -9
7 0
3 years ago
Read 2 more answers
Lisa buys package of 3,000 paper clips.
den301095 [7]

Answer:

300 paper clips in one box

300 multiply to 10 box =3,000 paper clips

6 0
3 years ago
Help me answer this thanks
patriot [66]
The first fourth and sixth would be the answer
3 0
3 years ago
Abby went to the store to buy ice cream for her party. Each box costs $3. She has a coupon for 20% off her total. If Abby buys 3
ollegr [7]

Answer: 7.2$

hope it helps :)

step-by-step explanation:

Cost of each box = 3$

Cost of 3 boxes without 20% coupon = 9$

With 20% off Coupon = 9 by 100 multiplied by 20

                                     (the zero's cut with each other leaving)

                                     = 9 by 10 multiplied by 2

                                     (9 multiplied by 2 = 18)

                                     = 18 by 10

                                     (18 divided by 10 = 1.8)

                                     = the 20% of 9$ is equal to 1.8

                                        when subtracted with the total cost leaves 7.2$

4 0
3 years ago
Ms. Hatcher bought the pencil decoration shown below for her bulletin board.
Gre4nikov [31]

Answer:

335.5 in^2

Step-by-step explanation:

The area is a rectangle and a triangle

The area of the rectangle is

A = a*b where a is 11 and b is 25

A = 11*25 =275

The area of the triangle is

A = 1/2 b*h  where b is 11 and h is 11

A = 1/2 (11) * 11

A = 60.5

The total area is 275+60.5=335.5

7 0
3 years ago
Read 2 more answers
Other questions:
  • Jeremiah received $65 for his birthday and used part of it to buy 3 video games. The games cost the same amount, and he had $14
    6·1 answer
  • If one bottle of the national brand of cough medicine costs $12, what is the cost of a bottle of the store brand if its 2/3 of t
    12·1 answer
  • In the figure below, segment AC is congruent to segment AB.
    13·2 answers
  • Monica works in a clothing store. Her monthly pay is $800. She also receives 5% commission on all her sales. She had $35,748 in
    12·2 answers
  • Write the equation of the line that is perpendicular to the line 5y=x−5 through the point (-1,0).
    13·1 answer
  • Which is taller? Statue of Liberty or the tallest tree in the world?
    11·1 answer
  • A cab company charges $2 per cab ride, plus an additional $2 per mile driven. How long is a cab ride that costs $100.
    13·2 answers
  • The temperature is -5.5 c in New York and -11.1c in Iowa
    9·1 answer
  • Find the value of y...​
    13·1 answer
  • What's the circumference of a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!