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
Svetradugi [14.3K]
3 years ago
13

Find an equation of variation where y varies directly as x and y = 15 when x = 5, find y when x is 19.

Mathematics
1 answer:
kvv77 [185]3 years ago
4 0

Answer:

y=3x

y=57, when x is 19.

Step-by-step explanation:

We are asked to write an equation of variation where y varies directly as x.

Since we know that a directly proportional equation is in form: y=kx, where k is the constant of proportionality.

Upon substituting x=5 and y= 15 in our equation of variation we will get,

15=k*5

k=\frac{15}{5}

k=3

Upon substituting k=3 in the standard equation of variation we will get our desired equation of variation as: y=3x.

Now let us find y, when x is 19.

y=3*19

y=57

Therefore, y equals 57, when x is 19.

You might be interested in
What is the value of 2 thirds + 3 fourths<br>​
inn [45]

Step-by-step explanation:

⅔ + ¾

→ make the denominator equal of both the fraction

= 2/3 × 4/4 = 8/12

= 3/4 × 3/3 = 9/12

hence,

8/12 + 9/12

= 8 + 9/12 = 17/12

\frac{17}{12} or \:  1  \frac{5}{12}

<em><u>hope</u></em><em><u> this</u></em><em><u> answer</u></em><em><u> helps</u></em><em><u> you</u></em><em><u> dear</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>take </u></em><em><u>care</u></em>

3 0
3 years ago
the angle of elevation from the tip of the shadow to the top of the tree is 36 degrees. find the distance from the top of the tr
Bas_tet [7]
In order to fully understand the problem, it is best to sketch it. Sketching the system, we will see that the system forms a triangle where the angle of elevation is 36 degrees. We are asked to find the hypotenuse. We can use a trigonometric function. It should be noted that one of the sides should also be given in order to calculate the hypotenuse. Trigonometric functions that can be used are:

sin(theta) = opposite / hypotenuse
cos(theta) = adjacent / hypotenuse
7 0
3 years ago
Read 2 more answers
Energy Basics:Question 1
marin [14]

Answer:

B and C, only

Step-by-step explanation:

5 0
3 years ago
Help help help plssssss
Novay_Z [31]

Answer:

SA = 108π cm²

Step-by-step explanation:

The surface area (SA) of a sphere is calculated as

SA = 4πr² ( r is the radius )

Thus the SA of a hemisphere is

SA = \frac{1}{2} × 4πr² = 2πr²

The area of the circular base = πr²

Then total SA is

SA = 2πr² + πr² = 3πr² = 3π × 6² = 3π × 36 = 108π cm²

5 0
3 years ago
Simplify the expression:<br> 6(20 + 1)<br> =
Vanyuwa [196]

Answer: 126

Step-by-step explanation: this is the distributive property so you multiply the number outside the parentheses times the numbers inside the parentheses

3 0
3 years ago
Other questions:
  • A figure in the quadrant is rotated 180 counterclockwise about the origin in which quadrant will the rotated figure appear?
    14·1 answer
  • A submarine is traveling 180 below sea level.Find the new position of the submarine after it ascends 55 feet
    11·2 answers
  • 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
    12·2 answers
  • PLEASE HELP MEEEE!!!I WILL GIVE BRAINLIEST !!~!~!The ordered pairs {(1, 2), (2, 3), (3, 4)} could be answers for the function ru
    9·1 answer
  • A. 12<br> B. 10<br> C. 6<br> D. 5
    8·1 answer
  • Traci plans to conduct a coin-flipping experiment to see if the probability of landing on "heads" or "tails" is close to the the
    10·1 answer
  • What is 0.312 in expanded notation
    7·1 answer
  • Compare the functions.
    14·1 answer
  • John has 5 cookies and gives 2 away how many does he have left
    12·2 answers
  • What is the scale factor of a drawing if the scale is 1 inch equals 4 feet
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!