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
kobusy [5.1K]
3 years ago
7

If x varies directly with y and x=3.5 when y=14 find x when y=18

Mathematics
1 answer:
jekas [21]3 years ago
4 0
\bf \qquad \qquad \textit{direct proportional variation}
\\\\
\textit{\underline{x} varies directly with \underline{y}}\qquad \qquad  x=ky\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad  variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
x=3.5\\
y=14
\end{cases}\implies 3.5=k14\implies \cfrac{3.5}{14}=k
\\\\\\
\cfrac{1}{4}=k\qquad therefore\qquad \boxed{x=\cfrac{1}{4}y}
\\\\\\
\textit{when y = 18, what is \underline{x}?}\qquad x=\cfrac{1}{4}(18)
You might be interested in
Combine like terms to simplify the expression:     
poizon [28]
7x + 3y -2 + 6x -1 - y^2 = -y^2 + 3 y+13 x - 3 \\ \\Answer : \ B. \ \ -y^2 + 3y + 13x-3


3 0
3 years ago
State the domain and range for the following relation.<br> {(-4,4), (1, 2), (0, 3), (3, 2)}
Andreas93 [3]

Answer:

Step-by-step explanation:

D= {-4,1,0,3}

R={4,2,3,2}

5 0
3 years ago
How do i evaluate it????
Kitty [74]

Answer:

1 for all evaluate questions

Step-by-step explanation:

just remember anything to the zero power is 1

4 0
3 years ago
Factor –3y – 18 and choose the correct option.
den301095 [7]
<h3>Factor –3y – 18 is:  -3(y + 6)</h3>

<em><u>Solution:</u></em>

Given that we have to factor -3y - 18

Use the distributive property,

a(b + c) = ab + bc

From given,

-3y - 18

Factor out the greatest common factor of 3 and 18

The factors of 3 are: 1, 3

The factors of 18 are: 1, 2, 3, 6, 9, 18

Then the greatest common factor is 3

Factot out 3 from given expression

-3y - 18 = 3( - y - 6)

Or else we can rewrite as,

-3y - 18 = -3(y + 6)

Thus the given expression is factored

5 0
3 years ago
You unfold chicken wire to make a circular pen. The area of the pen is 78.5 square meters. How many meters of chicken wire do yo
Lelu [443]
Circular pen means you are going to use Area = Pi(r^2). 

So 78.5 = pi(r^2). Divide by pi on both sides to get r^2 = 78.5/pi. Take the square root of that to get r or radius = approximately 4.99. If you need an exact answer then use \sqrt{ \frac{78.5}{ \pi } } for the next part because you are not done yet.

Plug whatever R you use into the circumference formula of Circumference = 2(pi)(r).

If you use 4.99, you do 2(pi)(4.99) which is approximately 31.35. If you use the exact answer, you do 2(pi)(\sqrt{ \frac{78.5}{ \pi} }) which gives you approximately 31.41. 

Either way you'll need about 31 meters of chicken wire but the 31.40796 or ~31.41 is closer to the exact answer. 
8 0
3 years ago
Other questions:
  • QUALITY CONTROL1)Specifications for a part for a DVD player state that the part should weigh between 24.6 and 25.6 ounces. The p
    15·1 answer
  • A high school student working part time as a cashier had a gross income of $8125 last year if her federal tax rate was 10% of th
    5·2 answers
  • Fill in the blank. The diagonals of a rhombus are __________________.
    10·2 answers
  • Juan rolls a 6-sided number cube 4 times. The result is 2. Which best describes the events?
    15·1 answer
  • Can someone please answer. There one problem. There's a picture. Thank you!
    9·2 answers
  • I want to know the question 3 plwsase
    12·1 answer
  • Write an equation of the line with a slope of 3/4 and a y-intercept of -2.​
    9·1 answer
  • Which is a solution of 1/4+x=0 0.25, 3/4, -3/4, or -0.25.
    9·1 answer
  • Find 7.1 times the diffrence between 60 and 14
    6·1 answer
  • Giren: Lines a and b <br> Are perpendicular.<br> Prove: &lt;3 and &lt;4 are complementary.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!