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
Mrrafil [7]
3 years ago
11

If y is directly proportional to x² and y=2 when x=3 Find the value of y when x=6Please Help

Mathematics
1 answer:
OlgaM077 [116]3 years ago
7 0

Answer:

y = 8

Step-by-step explanation:

Given that y is directly proportional to x² then the equation relating them is

y = kx² ← k is the constant of variation

To find k use the condition y = 2 when x = 3, then

2 = k × 3² = 9k ( divide both sides by 9 )

\frac{2}{9} = k

y = \frac{2}{9} x² ← equation of proportion

When x = 6, then

y = \frac{2}{9} × 6² = \frac{2}{9} × 36 = 2 × 4 = 8

You might be interested in
Which collection of three side lengths will not form a triangle
dezoksy [38]

Answer:

Any collection of lengths (a, b, c) which do not satisfy the triangle inequalities.

Step-by-step explanation:

Any collection (a, b, c) which do not satisfy the triangle inequalities. The inequalities:

a + b > c

b + c > a

a + c > b

You will need to test all of your options on the three inequalities above. If any one of the three fails, the collection won't work.

4 0
3 years ago
Simplify the expression. |5| - |-4|
mylen [45]

Answer:

1

Step-by-step explanation:

Absolute value means take what is inside and make it positive

|5| - |-4|

5 - 4

1

6 0
3 years ago
ASAP PLEASE HELP AND EXPLAIN TOO!!!!!!
VARVARA [1.3K]
Looking at number 4, you first have to look at the information that you have:
On tuesday he practiced for 1 5/6 hrs
Monday he practiced for 7/10 hrs
He is supposed to practice for 1 1/4 hr.
You could write questions like:
How much more did Marco practice on Tuesday than he is supposed to practice?
This works because it does indeed involve subtraction, you would be subtracting the amount that he should have practiced from the amount of time that he did practice. 
If I didn't answer the question, please message me and I will clarify!
6 0
4 years ago
How to write 1.075 in expanded form
mihalych1998 [28]
Expanded form just means to expand the number out. To change this in to expanded form you just need to do the following:-

1.000 + 0.0 + 0.07 + 0.005 = 1.075.

Hope I helped ya!! 
3 0
3 years ago
Read 2 more answers
2(1/2q+1)=-3(2q-1)+4(29+1)
FrozenT [24]
Q+2=-6q+3+120
Q+2= -6q+123
+6q +6q
7q+2=123
-2. -2
7q =121
Divide by 7 on each sides to get
q= About 17
4 0
3 years ago
Other questions:
  • All my points and BRAINLIEST!!!!<br><br> Please help
    5·2 answers
  • Austin made punch by mixing 28 ounces of lemonade 14 ounce of orange juice and 28 ounces of ginger ale. what is the ratio of oun
    8·1 answer
  • Three identical bags each contain two marbles. One bag has two white marbles, one has two black marbles, and one has one of each
    15·1 answer
  • I NEED HELP WITH THIS SUBJECT<br>​
    15·2 answers
  • 512 as a power of a number
    12·1 answer
  • Factorise the following fully: <br>6a⁴b⁶-8a³b⁵+12a²b³​
    14·1 answer
  • How many millimeters are in 6 <br>decimeters ​
    5·1 answer
  • Use the equation √4x+15 - 3√x How many potential solutions are there? ​
    14·1 answer
  • What is 2x-9=5x+12 with the step by step
    12·2 answers
  • What is 57, 020, 000 expressed in scientific notation
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!