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
slavikrds [6]
2 years ago
14

Suppose that y varies directly with x. Given x=4 when y=20. Find y when x = 3

Mathematics
1 answer:
scoray [572]2 years ago
4 0

Answer:

y = 15

Step-by-step explanation:

Given: y varies directly with x, x=4 when y=20

To find:  y when x = 3

Solution:

As y varies directly as x, it means that as x increases, y also increases by the same factor.

As y varies directly with x,

y=kx

Here, k is a constant

As x = 4 when y = 20,

20=4k\\k=\frac{20}{4}=5\\\Rightarrow y=5x

Put x = 3

y= 5(3) = 15

You might be interested in
While Edward was visiting his sister in Westminster, he bought a toothbrush that was marked down 80% from an original price of $
Andre45 [30]

Answer:

$1.78

Step-by-step explanation:

5 0
3 years ago
Sara tried to evaluate 21 : 7 x 8 step-by-step
nlexa [21]

Answer: Sara multiplied by 3 when she should have multiplied by 8.

Step-by-step explanation:

21 : 7*8

7*8 = 56

21 : 56

The simplest form of this ratio is 3 : 8

6 0
3 years ago
No clue on this need help please
maria [59]
It would be 10x5 + 3x8= 74 
5 0
3 years ago
Read 2 more answers
Please help me on this I’m super stuck
erastova [34]

Answer:

<u>BC = 3.1666</u>

Step-by-step explanation:

To solve this you need to know that cosine∅ = adjacent/hypotenuse. We already know that hypotenuse = 5 and that ∅ = 70*. By substituting these in you will get cosine 70* = adjacent/5. Evaluate cosine 70* on the calculator and get 0.633... Multiply both sides by 5 and get adjacent is about equal to 3.1666. Because BC is the adjacent side of the triangle, this is the length of BC.

6 0
3 years ago
What do you notice about the ratios of the lengths for each transversal? How do they compare?
lesya [120]

Answer:

Wait what my brain hurtssssss

4 0
3 years ago
Read 2 more answers
Other questions:
  • Andre drew a quadrilateral with four right angles and two pairs of congruent sides. What type of quadrilateral did he draw? Expl
    13·1 answer
  • Subtract.<br><br><br><br> ANSWERS: <br> 3x + z + 9<br> 3x - 16y - z + 9<br> 3x - z + 9
    8·2 answers
  • What is the range of f(x)=lxl-6?
    5·1 answer
  • 16x+x =12 solve justify each step with algebraic property
    13·1 answer
  • What is the slope of the line that passes through the points (-2,7) and (2,-5) in simplest form ?
    14·1 answer
  • The number of trees in a rainforest decreases each month by 0.5%. The forest currently has 2.5 billion trees. Which expression r
    10·1 answer
  • Camelle manages her soccer team. She needs to order 4 practice jerseys for each player. There are y players.
    11·2 answers
  • A number is 3 1/3 greater than another. If the sum of the numbers are doubled the answer would be 19 1/2
    14·2 answers
  • Pls help I’ll give you 38 points
    12·2 answers
  • Evaluate using suitable identity:<br>c). 98²​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!