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
Gelneren [198K]
3 years ago
15

If Y is directly proportional to X² and y=21 when x=2, find the value of y when X=4.

Mathematics
2 answers:
kykrilka [37]3 years ago
8 0

Step-by-step explanation:

it means y/x^2=k

when y=21, x=2; k is 21/4.

when x=4, k is y/16.

k=21/4=y/16.

the next step is easy to see, you can do it.

frozen [14]3 years ago
7 0
The value of y will probably be 4.
You might be interested in
Complete the following.
Otrada [13]

Answer:

Step-by-step explanation:

1) the triangle is a right angle triangle.

From the given right angle triangle,

With 67° as the reference angle,

x represents the adjacent side of the right angle triangle.

17 represents the opposite side of the right angle triangle.

To determine x, we would apply

the Tangent trigonometric ratio.

Tan θ = opposite side/adjacent side.

Therefore,

Tan 67 = 17/x

xTan 67 = 17

x = 17/Tan 67

x = 17/2.3559

x = 7.22

2) From the given right angle triangle, with 24° as the reference angle,

x represents the opposite side of the right angle triangle.

12 represents the adjacent side of the right angle triangle.

To determine x, we would apply

the Tangent trigonometric ratio.

Tan θ = opposite side/adjacent side.

Therefore,

Tan 24 = x/12

x = 12Tan 24

x = 12 × 0.4452

x = 5.34

4 0
4 years ago
Describe the relationship between the terms in the sequence 6, 18, 54, 162... Then write the next three terms in the sequence
Nadusha1986 [10]
They're just multiplying those numbers by 3 then just multiply 162 by 3 to get one of the next numbers in the sequence then multiply those awnser you get by 3
7 0
3 years ago
If f(x) = 6x ^ 2 - 4a and g(x) = 2x + 2 find (f - g)(x)
bazaltina [42]

Answer:

6x^2-4a-2x-2

Step-by-step explanation:

6 0
4 years ago
(Decimals into Fractions)
sergij07 [2.7K]
65/100= 13/20 the answer to the question
8 0
3 years ago
Read 2 more answers
Does anyone know the answers to any of those if you know 1 or 2 or 3 of them pls help me worth 13 points
solniwko [45]
23) The decimal place with the greatest digit difference is tenths place 
ex: 1.2
         ^ that number right after the decimal is the tenths place
24) The difference between the heights of Mount Steele and Mount Blackburn is 0.048. I found this by subtracting the height of Mount Steele from the height of Mount Blackburn
25) You order the heights of the mountains by looking to see which mountain has the largest number before the decimal. If they are all the same number, you look to the first number behind the decimal, the tenths place and find what number is the largest, and closest to becoming another whole number. If they are all the same number again, you must look to the hundreths place to find the next largest number of the group. Whichever number has the largest number in this spot, would be the largest, as the mountain with the second largest number in the hundreths place would be the second largest mountain and so forth.
I hope this helps:)
6 0
4 years ago
Other questions:
  • Kevin delivers newspapers in his town every morning. The amount he earns from delivering newspapers is given by y = 30x + 18, wh
    14·2 answers
  • BRAINLIEST ASAP! PLEASE HELP ME :)<br> thanksss!
    13·1 answer
  • an artist has collected 15/16 pounds of seashells. he wants to give away 8/21 of the total weight of the seashells. how many pou
    12·2 answers
  • If 120 million roses were sold on Valentine's Day, and 75% of the roses were red, how
    14·1 answer
  • Define treatment. Choose the correct answer below. A. The quantitative or qualitative variable for which the experimenter wishes
    13·1 answer
  • Solve for a p^2+a^2/r =k
    9·1 answer
  • B. Find the GCF and LCM of 2^3 x 3^4 x 7 and 2^5 x 5^2 x 7^3 x 13<br> Please urgent!
    13·2 answers
  • Factorise <br>p^2 + 8 - 8p - p​
    10·1 answer
  • Giving 100 points whoever get this right
    15·2 answers
  • Mad math for pi, I have no clue how to do this!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!