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
Semmy [17]
3 years ago
6

Determine the projection of w onto u.

Mathematics
2 answers:
Aliun [14]3 years ago
5 0

Answer:

a

Step-by-step explanation:

irina [24]3 years ago
4 0

Answer:

A.6.2i-4.2 j

Step-by-step explanation:

We are given that

u=9i-6j

v=-3i-2j

w=19i+15j

We have to find the projection of w on to u.

The project of vector a on b

=\frac{a\cdot b}{\mid b\mid^2}b

w.u=(19i+15j)\cdot (9i-6j)=171-90=81

\mid u\mid=\sqrt{x^2+y^2}=\sqrt{9^2+(-6)^2}=\sqrt{117}

Using the formula

The projection of w on to u

=\frac{u\cdot w}{\mid u\mid^2}(u)=\frac{81}{117}(9i-6j)

The projection of w on to u=6.2i-4.2j

Hence, option A is true.

You might be interested in
Example on worksheet (subtracting by adding up)
Lisa [10]

Answer:

(49 - 29) + 1 =(50 - 29)

Step-by-step explanation:

The 20 comes from the subtraction of 29 in both sides of the previous step equality. In the following, I transcript the complete procedure and I add the step that you need to understand why 20 appears (in bold numbers):

29+20=49

49+1=50

(49 - 29) + 1 =(50 - 29)

20+1=21

50-29=21

hence, it was only nesseraty to subtract 29

3 0
3 years ago
Simplify: 0.810×0.00048 all over 0.000400×0.027
elixir [45]

Answer:

36

Step-by-step explanation:

Okay! This question is a very simple one, but without a calculator, your answer could easily vary from others! So, let´s do this one together!

The equation:

0.810x0.00048/0.000400x0.027

Let´s do the top :

0.810 x 0.00048 = 0.0003888

I will leave these numbers the same until the last part, lets not round them.

Bottom:

0.0004 x 0.027 = 0.0000108

And again I am not going to round this number.

Now we can divide!

0.0003888/0.0000108 = 36

I hope this helped!

4 0
3 years ago
Read 2 more answers
What is 3 times 8/9 in multiplaction
saw5 [17]

Answer:

2.99999997

Step-by-step explanation:

its not a whole number.

5 0
3 years ago
Read 2 more answers
If y varies inversely with x and y triples, then what happens to x?
Drupady [299]

Answer:

The value of x is reduced to one third when the value of y is tripled.

Step-by-step explanation:

Here,  y varies inversely with x.

⇒y \propto \frac{1}{x} \\\implies y =  \frac{k}{x}

Here, k = Constant of Proportionality.

⇒   k = x y  ..........  (1)

Now, given y' = 3 y

to find the value of x'

Putting the value in

y ' =  \frac{k}{x'}  \implies 3y=  \frac{k}{x'}\\\implies  k = 3yx'

or, k  =  3 y x '..........  (2)

From above statement  (1) and (2)

⇒ xy  = 3yx'

or, x '   =  x/3

Hence, the value of x is reduced to one - third  when the value of y is tripled.

5 0
3 years ago
Dan has some marbles. Ellie has twice as many marbles as dan.frank has 15 marbles. Dan,Ellie and frank have a total of 63 marble
cricket20 [7]
16 is how many dan has.   

5 0
3 years ago
Read 2 more answers
Other questions:
  • What two numbers multiply to -42 but also add up to -11
    5·1 answer
  • Franado brought 8 pints of milk how many fluid ounces of milk did he by <br>16<br>64<br>128<br>256
    5·1 answer
  • A glass of water has 1/9 of a liter how many glasses would it take to fill up a 5 liter jug
    14·2 answers
  • PLZ HELP NEED ANSWER ASAP TIA
    7·2 answers
  • I need help ASAP pls
    11·2 answers
  • The function F(x) is describe below F(x)=3+2 what is the value of F(5)
    9·1 answer
  • Alaska has a land area of about 1700000 square miles Florida has a land area one tenth of the size of Alaska what is the land ar
    5·1 answer
  • Find the solutions of the quadratic equation 2x2 + 6x - 2 = 0.
    5·1 answer
  • If there are 21 ladybugs how many bumblebees?​
    5·1 answer
  • Compare the values of the 5s in the number 1.055
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!