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
neonofarm [45]
4 years ago
6

Explain why the expression 7•3x is not equal to the expression 21x

Mathematics
1 answer:
rusak2 [61]4 years ago
5 0
The expression 7•3x is not equal to the expression 21x. You might think that the two expressions are the same since 7x3 is 21 but the first expression is a dot product. This kind of expression includes the magnitude and direction of the vector in an expression, for example, <span>7•3x. The second expression, 21x, expresses only the magnitude and does not include the direction.</span>
You might be interested in
Two steamers leave a port on a river at the same time, traveling in opposite directions. Each is traveling 22 mph. How long will
vivado [14]

It took both  2.5 hours to be 110 miles apart

Speed is the ratio of distance travelled to time taken. Speed is given by:

Speed = distance / time

Since both steamers is travelling at 22 mph. therefore they cover the same distance at the same time. For them to be 110 miles apart, they need to each have covered 55 miles in the opposite direction

22 = 55/time

time = 2.5 hours

Therefore after 2.5 hours they would have covered 55 miles each therefore being 110 miles apart.

Find out more at: brainly.com/question/22610586

7 0
3 years ago
Carla and Jordan were trying to solve the equation: (x+1)(x-1)=8(x+1)(x−1)=8left parenthesis, x, plus, 1, right parenthesis, lef
defon

Answer:

Only Carla

Step-by-step explanation:

Its the right way to solve (x+1)(x-1)=8

5 0
3 years ago
A large grandfather clock strikes its bell once at 1:00, twice at 2:00, three times at 3:00, etcetera. what is the total number
erastovalidia [21]
There is a formula for adding consecutive integers.
sum = (n * (n+1)) / 2
for summing 1 through 12 it is
sum = (12 * 13) / 2 = 156/2 = 78
The clock goes through two "12-hour cycles" in a day, so the answer is 2 * 78 or 156 times.


8 0
4 years ago
Read 2 more answers
8. How many days would it take to travel from Washington, D.C.,
adell [148]

Answer:

What are the choices and what grade level going to 4th-12th

Step-by-step explanation:

7 0
3 years ago
Mikey spent 16 hours and 36 minutes on a puzzle. He's almost done but needed 4 hours and 43 more minutes to complete it. How lon
Lemur [1.5K]

Answer:

21 hours and 19 minutes

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Mike was shipping 5 books that weighed 1 1/3 pounds each. How much was the total weight?
    14·2 answers
  • 100 members of a Gym are surveyed. The results are shown below. Given the gym member chosen at random is a female, what is the p
    14·1 answer
  • Given: DR tangent to Circle O.
    6·2 answers
  • For every person who actually has the flu there are 6 people who have the flu resulting in a cold. If a doctor sees 49 patients
    6·2 answers
  • logan drov from new orland to nashvill to visit friends his speed limit is 60 miles per hour if logans driving for the trip was
    9·1 answer
  • Kittens weigh about 100 grams when born and gain 7 to 15 grams per day. If a kitten weighed 100 grams at birth and gained 8 gram
    10·1 answer
  • Which graph has the same end behavior as the graph of f(x) = -3x - x4 + 1?
    6·1 answer
  • Simplify <br><br> -4 is greater than or equal to 3v
    13·1 answer
  • I’m not sure how I do this. Plz help me
    7·1 answer
  • Solve the inequality x − y &lt; z for x
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!