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
AlladinOne [14]
3 years ago
9

Yan is running on a track that is of a km long. She can run 4 laps in 12

Mathematics
1 answer:
sashaice [31]3 years ago
7 0

Answer:

3 km per minute

Step-by-step explanation:

12/4=3 laps

3 km per minute

You might be interested in
Solve 11 < or equal to -11v
nignag [31]
1 < or equal to - v

- 1 > or equal to v
3 0
3 years ago
Read 2 more answers
Vector v is shown in the graph.
Elis [28]

Question 4

<h3>Answer: Choice D</h3>

Explanation:

If the initial point is the origin, the coordinates of the terminal point form the vector itself in component form. We go from (-8,6) to <-8,6>. The notation change is from ordered pair to vector format.

We have a right triangle with legs of 8 and 6 units. The pythagorean theorem will help us determine the hypotenuse is 10. Therefore, the vector length is 10 units and we would say ||v|| = 10. We have a 6-8-10 right triangle.

===========================================================

Question 5

<h3>Answer: Choice B</h3>

Explanation:

Vector v starts at (2,5) and ends at (-3,-2).

The x component of the vector is x2-x1 = -3-2 = -5 meaning we move 5 units to the left when going from the start point to the endpoint.

At the same time we move 7 units down because y2-y1 = -2-5 = -7 which is the y component of the vector.

The component form of vector v is

v = <-5, -7>

it says "move 5 units left, 7 units down".

Apply the pythagorean theorem to find the length of the vector.

a^2+b^2 = c^2

c = sqrt(a^2 + b^2)

||v|| = sqrt( (-5)^2 + (-7)^2 )

||v|| = 8.602 which is approximate.

Now let's use the arctangent function to find the angle

theta = arctan(b/a)

theta = arctan(-7/(-5))

theta = 54.462 which is also approximate.

There's a problem however. This angle is in Q1 but the vector <-5,-7> is in Q3. An easy fix is to add on 180 to rotate to the proper quadrant.

54.462+180 = 234.462

which is the proper approximate angle for theta.

6 0
2 years ago
What is the solution to this addition sentence? 3/4 + (-1/2) = _____
Vikki [24]

\text{Remove parentheses}\\\frac{3}{4} - \frac{1}{2} \\\text{Simplify}\\\frac{1}{4} \checkmark

6 0
3 years ago
Read 2 more answers
What is nine times what equals 513
guapka [62]

Answer:

57

Step-by-step explanation:

How I did this was 513 divided by 9 so the equation that I did was 513/9.

4 0
3 years ago
Read 2 more answers
Subtract j from 9, then subtract 3 from the result
Temka [501]

Answer

(9-j)-3

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Emily rented a bike from kaylas bikes. It cost $15 plus $5 per hour.
    8·1 answer
  • Find the median of the table below. Number of inches 20,22,24,26. Frequency 3,2,1,3. ​
    12·1 answer
  • Max is having a party for his four friends. He fills each gift bag with 3 candy bars and then divides the stickers equally among
    14·1 answer
  • Maya has 200 songs on her cell phone. 48 songs are K-Pop. What ​percent​ of Maya's songs are K-Pop?
    15·1 answer
  • HELP I WILL GIVE BRAINLIEST!!!!
    13·1 answer
  • A telephone pole support cable attaches to the pole 24 feet high. If the cable is 30 feet long, how far from the bottom of the p
    7·1 answer
  • Solve for the value of x.<br><br> x/1.2 = 7
    9·1 answer
  • FIND THE VALUE OF X ANSWER ASAP 100 POINT QUESTION
    12·2 answers
  • ABCD is a quadrilateral with A(8,3), B(6, 7), C(-1,5), D(-6, -1). Determine whether ABCD is a trapezoid. Justify
    13·1 answer
  • Solve the system of equations by adding them together term by term to eliminate one variable:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!