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
GuDViN [60]
3 years ago
9

If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?

Mathematics
2 answers:
IRINA_888 [86]3 years ago
6 0

Answer:

For the case when x = 8, we have that y = 2/3.

Step-by-step explanation:

The idea that y varies directly as x, can be written in an equation as:

y = k*x, where k is an unknown constant (until now).

We know that y=6 when x=72, then, substituting these values in the above formula gives us the value of k:

6 = k*72, then: k = 6/72 = 1/12.

Now, we can rewrite our initial expression with the known value of k as:

y = (1/12)*x

For the case when x = 8, we have that:

y = (1/12)*8 = 8/12 = 2/3.

Len [333]3 years ago
4 0
Assumption: y=kx then sustitude y=6,x=72 into y=kx
then 12y=x
You might be interested in
If X > 0 and y > 0 , then which quadrant holds the solutions ?
pantera1 [17]

Answer:

First Quadrant

Step-by-step explanation:

The quadrant in which both x and y are greater than 0 is the First Quadrant.

8 0
3 years ago
A square has an area of 81x square cm. What is the perimeter of the square ?
Fudgin [204]

Answer:

The perimeter of the square is 36\sqrt{x}\ cm

Step-by-step explanation:

step 1

Find the length side of the square

we know that

The area of a square is equal to

A=b^{2}

where

b is the length side of the square

we have

A=81x\ cm^{2}

substitute and solve for b

81x=b^{2}

square root both sides

b=9\sqrt{x}\ cm

step 2

Find the perimeter of the square

we know that

The perimeter of the square is equal to

P=4b

we have

b=9\sqrt{x}\ cm

substitute

P=(4)9\sqrt{x}

P=36\sqrt{x}\ cm

6 0
3 years ago
What does 34/24 equal to​
Scrat [10]

Answer:

17/12

Step-by-step explanation:

a positive improper fraction. the numerator becomes the denominator.

5 0
3 years ago
Read 2 more answers
The measure of an angle is 39°. What is the measure of its complementary angle?
Novosadov [1.4K]

Answer:

51 degrees

Step-by-step explanation:

Complementary angles are two angles whose sum is (90degrees). If one is given an angle measure and needs to find its complementary angle, then all one has to do is subtract the given angle measure from (90degrees).

90 - 39 = 51

3 0
3 years ago
Read 2 more answers
Hello, I really need help with this!
yuradex [85]
1. Given
2. Definition of Supplementary Angles
3. First Substitution
4. Subtraction property of Equality
5. Second Substitution
6. Exterior Side in Opposite Rays
7. If corresponding angles are equal, then lines are parallel
5 0
3 years ago
Other questions:
  • Is the ratio 4.2:1.5 proportional to the ratio 12:5
    14·1 answer
  • What is 7.4/2.5 = 16/y what is y
    9·1 answer
  • Describe the transformations from the graph of f(x)=∣x∣ to the graph of r(x)=∣x+2∣− 6.
    7·1 answer
  • What is the product of (3.8 x 106) and (6 x 103)?
    10·1 answer
  • In circle C, PA and PB are tangents. If PA = 12 and PC = 13, find the length of ED. If you answer can you give the step-by-step
    5·1 answer
  • What is the radius of tye circle
    14·1 answer
  • Help me please sjsjdjs it’s due in a few minutes
    9·2 answers
  • Kiran’s backpack weighs 3 pounds less than Clare’s backpack. Clare’s backpack weighs 14 pounds.
    12·2 answers
  • Enter the letter of each point on the number line that corresponds to its value.
    7·1 answer
  • What is the non-perfect square root of 9.6
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!