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
Sveta_85 [38]
3 years ago
7

Y varies directly with x, and y = 15 when x = 3. What is the value of x when y = 4?

Mathematics
2 answers:
TiliK225 [7]3 years ago
8 0
When x = 3 , y = 15 , divide both by 3.
When x= 1 , y = 5. Now multiply both by 4/5
When x = 4/5 , y=4
Mnenie [13.5K]3 years ago
7 0
Y varies directly with x so use
y/x

so when y=15 and x=3

substitute =15/3

when y=4 use y/x again so 4/x (you do not know the x)

15        4
---   *   ---
3          x

cross multiply
15x=12
isolate x by dividing 15 on both sides
get x=12/15

You might be interested in
What is a solution set
umka21 [38]
<span>the set of all the solutions of an equation or condition.



</span>
7 0
3 years ago
Which prediction can you make based on this graph?
Colt1911 [192]

Answer:more people will be living in Africa than in Asia sometime around 2120

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
How to solve this **EXPLAIN FOR MORE POINTS** : 0.35 x 1.5
gogolik [260]
Hope this helps you understand

5 0
3 years ago
Read 2 more answers
Select the correct answer
Citrus2011 [14]

Answer:

1/5 start with A

Step-by-step explanation: 5*5=25 possible combos 5 of which will be starting with A. 5/25 can be simplified to 1/5

3 0
3 years ago
Read 2 more answers
Sarah is building a set of four shelves each shelf will have two supports in the shape of right isosceles triangle's each shelf
Rama09 [41]

Answer:

784 in² of wood

Step-by-step explanation:

Sarah  needs two supports by shelf, and  she will build 4 shelves

then she will need 8 supports

Now each support is a  right isosceles triangle.

Area of a triangle is

A(t)  = 1/2 *b*h      where  b is the base and h is the heigh of the triangle.

A right isosceles triangle has two sides ( base and heigh equals) and in our particular case are equals to 14 in, therefore

A(t)  = 1/2*14*14

A(t)  =  98 in²

Sarah needs 8 pieces of 98 in² she needs

A =  8*98

A  = 784 in² of wood

7 0
3 years ago
Other questions:
  • 5x7/10=. The product lies between. And.
    11·1 answer
  • the height y,in feet,of a football x seconds after it is ththrown is modeled by the equation y=16x^2+24+1.what information does
    5·2 answers
  • Can somebody help me with this question?
    6·2 answers
  • Find the percent of change<br> 48 notebooks to 14 notebooks
    9·1 answer
  • The numbers of inches of snow per month in Portland, Maine, for a period of twelve months, are:
    13·2 answers
  • The radius of a cylindrical construction pipe is 3.5 ft. If the pipe is 37 ft long, what is its volume?
    15·1 answer
  • Please help with this question <br> Thank you
    6·1 answer
  • -5b = -20 b= need help with homwork
    15·2 answers
  • ALGEBRA Find the value of x in each figure.<br><br> HELP ASAP
    7·2 answers
  • nathan ordered one cheeseburger and one bag of chips for $3.75. jack ordered two cheeseburgers and three bags of chips for $8.25
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!