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
erastova [34]
3 years ago
12

The value of y varies directly with x, and y = 343 when x = 49. Find y when x = 8

Mathematics
1 answer:
Ivan3 years ago
5 0

\bf \qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad  y=kx\impliedby  \begin{array}{llll} k=constant\ of\\ \qquad  variation \end{array}\\\\ -------------------------------\\\\ \textit{we also know that } \begin{cases} y=343\\ x=49 \end{cases}\implies 343=k49\implies \cfrac{343}{49}=k \\\\\\ 7=k\qquad therefore\qquad \boxed{y=7x} \\\\\\ \textit{when x = 8, what is \underline{y}?}\qquad y=7(8)\implies y=56

You might be interested in
Does anyone know the answer?
melamori03 [73]

<em>value \: of  \: x \: is \: 210 \\please \: see \: the \: attached \: picture \\ for \: full \: solution \\ hope \: it \: helps</em>

6 0
3 years ago
Read 2 more answers
6y - 5x = 5 and x= 2y + 7
jolli1 [7]
Y = -10 and x = -13 (substitute 2y + 7 for x)
5 0
3 years ago
If a can is 20cm Haigh X 8cm diameter what is the volume
sattari [20]
Radius=8/2=4cm

volume=4*4*3.14*20=1004.8

The answer is  1004.8cm₃

7 0
3 years ago
Which of the following is a reasonable estimate for the weight capacity of an elevator that can carry up to 15 people?
Bas_tet [7]

A is the most common

6 0
3 years ago
Read 2 more answers
9. What type of transformation is shown?
gizmo_the_mogwai [7]
A reflection I think is true
7 0
2 years ago
Other questions:
  • Does 5x-1=3(x+11) have one solution
    12·2 answers
  • A toy company intends to ship out its entire stock of 13,257 toy trucks and five times as many toy cars. If each box hold 109 to
    15·1 answer
  •  If the equation y = 15x + 2 is changed to y = 15x - 4, how will the graph of the line change?
    15·2 answers
  • Find the slope of the line graph above
    6·1 answer
  • Sweaters cost $39 each. This is $15 more than the price of a cap. Over the season, 725 caps were sold. What was the total sales
    8·1 answer
  • Answer the following question about the function whose derivative is given below
    6·1 answer
  • Find the lengths of the bases of the trapezoid with a height of 10 ft. One base is 4ft longer than the other bases. The area is
    7·1 answer
  • The sum of two-thirds of a number and twenty
    5·1 answer
  • A 99% confidence interval (in inches) for the mean height of a population is 65.7 &lt; μ &lt; 67.3. This result is based on a sa
    6·1 answer
  • PLEASE HELP I NEED THE ANSWER TO THIS!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!