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
Scilla [17]
3 years ago
5

What is the magnitude of -2a - 3b when a=3i+9j and b=4i-6j?

Mathematics
1 answer:
nekit [7.7K]3 years ago
6 0

Answer: Dot product of the 2 vectors = 0. Therefore cos x = 0 where j is the angle between the 2 vectors. S0 j = 90°... I believe.

You might be interested in
Expanded number is 7,080,287
stiv31 [10]
7,000,000+80,000+200+80+7
6 0
3 years ago
The phrase “twice the difference of a number 5” can be written as which variable?
svlad2 [7]

Let

x-------> the number

we know that

1) The phrase “the difference of a number and  5” can be written as

(x-5)

2) The phrase “twice the difference of a number and  5” can be written as

2*(x-5)

therefore

<u>the answer is the option</u>

1. 2(x-5)

5 0
3 years ago
The sum of two numbers is 28 and their difference is 4. What are the numbers?
Maru [420]
The sum of the two numbers would be 12 and 16. 12+16=28 and 16-12=4
3 0
4 years ago
Read 2 more answers
Does anyone know the answer to this?​
DENIUS [597]

Answer:

B

Step-by-step explanation:

-3/4y - 1/5y = 380 can be simplified to -19/20y = 380.

In order for the student to incorrectly get 361, they likely just multiplied the 380 by 19/20 rather than multiplying by the reciprocal (which would be -20/19).

This means the best answer should be B.

5 0
3 years ago
What are interger coordinates
nordsb [41]

Answer:

Integer coordinates are pairs of integers that are used to determine points in a grid, relative to a special point called the origin. The origin has coordinates (0,0). Any other point in the grid has a pair of coordinates (x,y).

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
Other questions:
  • The coordinates of point L on a coordinate grid are (−2, −4). Point L is reflected across the y-axis to obtain point M and acros
    5·1 answer
  • A rhombus has a perimeter of 36 cm. What is the length of each side?
    11·2 answers
  • A child puts one five-rupee coin of her saving in the piggy bank on the first day. She increases her saving by one five-rupee co
    5·1 answer
  • A bank withdrawal of $50
    14·1 answer
  • The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.
    12·1 answer
  • A rectangle's length is three times its breadth x metres. Write an expression
    15·1 answer
  • What are the zeros of f(x) = x2 + x – 30?
    6·2 answers
  • What is the common difference of the following sequence?<br>3,5,7,9,11___<br><br>16,19,22,25___​
    14·1 answer
  • The table gives the temperature (in °F) in five citiesſat 6 a.m. on the same day. Use the table to answer the questions.
    9·1 answer
  • Can you guys help me? if not then dont answer
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!