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
yawa3891 [41]
3 years ago
14

Which of the following expressions are meaningful? Which are meaningless? Explain. (a) (a · b) · c (a · b) · c has because it is

the dot product of . (b) (a · b)c (a · b)c has because it is a scalar multiple of . (c) |a|(b · c) |a|(b · c) has because it is the product of . (d) a · (b + c) a · (b + c) has because it is the dot product of . (e) a · b + c a · b + c has because it is the sum of . (f) |a| · (b + c) |a| · (b + c) has because it is the dot product of .
Mathematics
1 answer:
Alex777 [14]3 years ago
5 0

Answer:

a. It is meaningless.

b. It has meaning.

c. It has meaning.

d. It has meaning.

e. It is meaningless.

f. It is meaningless.

Step-by-step explanation:

a. (a.b).c.

This is meaningless, a.b will give a scalar and we can't take the dot product of the scalar result with vector c.

b. (a.b)c

This has meaning, a.b will give a scalar, the the scalar will be multiply with the vector c.

c. |a|(b.c)

This has meaning, |a| means magnitude of vector a and it will a scalar and this is multiple by the scalar result of b.c

d. a.(b+c)

This has meaning, b+c will give another vector then, the scalar product of the result and vector c will be calculated and it will gives us a scalar answer.

e. a.b+ c

This is meaningless, the dot product of a.b will give a scalar result and the scalar result canont be added to c. We can't add a scalar to a vector.

f. |a|.(a+b)

This is meaningless, |a| means the magnitude of vector a and that is a scalar. The scalar product of a scalar and a vector cannot be calculated.

You might be interested in
Solve the equation.
Hitman42 [59]
(x+4)(x+6)=0
x = -4, x=-6

The answer is C.
4 0
3 years ago
Find the slope of the line. <br> Will give brainiest if correct.
tia_tia [17]

Answer:

1,2

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which number line model represents the expression -4+7.5?
vlada-n [284]

Answer:

A)

Step-by-step explanation:

6 0
3 years ago
Answer the questions by drawing on the coordinate plane below.
solniwko [45]

Coordinates of the given triangle ΔPQR P(1,-1), Q(3,-2), R(3,-4).

a) Let us discuss the rule for rotation of 90° clockwise about the origin.

If given coordinate is (h,k) is rotated 90° clockwise about the origin the position of rotated coordinate will be (k, -h).

x and y coordinates would switch their values and after switching x any values, the y value of the coordinates would reverse in sign.

So, the coordinates of rotated ΔPQR P(1,-1), Q(3,-2), R(3,-4) would become

P(1,-1) --> P'(-1,-1)

Q(3,-2) --> Q'( -2,-3)

R(3,-4) --> R'(-4,-3)

b) If given coordinate is (h,k), the coordinates after reflection across the x-axis would besome (h,-k). (Just change in the sign of y-coordinate).

So, the coordinates of rotated ΔPQR P(1,-1), Q(3,-2), R(3,-4) would become

P(1,-1) --> P"(1,1)

Q(3,-2) --> Q"( 3,2)

R(3,-4) --> R"(3,4)



6 0
3 years ago
What is the anser for 194*33333
kkurt [141]

(the answer is) = 6466602

8 0
3 years ago
Other questions:
  • I need help!How would i find the value of X?
    15·2 answers
  • Round each number to the nearest 10 5,389
    12·2 answers
  • Please explain in detail how to find the focus, vertex, and directrix of this parabola:<br> y= -2x²
    12·1 answer
  • Please understand the explanation
    9·1 answer
  • Find the value of x please and fast!!
    13·1 answer
  • Is this correct, if not what’s the answer
    8·2 answers
  • Martin deposited $2,000 into an account that earned 5% simple interest over 10 years. What is the amount of interest earned afte
    14·1 answer
  • Standard deviation of the data. 160,220,220,249,190​
    8·1 answer
  • Need help with solving this please
    6·2 answers
  • Which cost the most per tablet
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!