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
Salsk061 [2.6K]
3 years ago
15

Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y

when x = –2?
Mathematics
1 answer:
ZanzabumX [31]3 years ago
4 0
Hello,

y=kx and if y=8 then x=-6
==>8=k*(-6)==>k=-4/3

if x=-2 then y=-4/3 * (-2)=8/3
You might be interested in
Help me hot to do this plz
liraira [26]

Answer5:

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Let f be a functions of degree 4 whose coefficients are real numbers: two of its zeros are - 3 and 4 - i. Explain why one of the
kvasek [131]

Answer:

Step-by-step explanation:

We have the following theorem, if f is a polynomial with real coefficients, we can factor it completely in factors of the degree at most 2.

Consider first a polynomial of degree two, hence it is a polynomial of the form ax^2+bx+c. The cuadratic formula tells us that the solutions are of the form

x = \frac{-b\pm \sqrt[]{b^2-4ac}}{2a}.

Note that square root, over the reals, tells us that the are only real solutions if b^2-4ac \geq 0. If that is not the case, say it's negative, the solution are complex. Then, the solutions are of the form

x = \frac{-b \pm i \sqrt[]{4ac-b^2}}{2a}. NOte that this means that if we have a complex number of the form a+bi that is a solution, then the number a-bi (who is called the complex conjugate) is also a solution.

Recall that when we have a polynomial f(x) whose a zero is the number c, then we can factor f as follows f(x) = (x-c) * p(x) where p(x) is another polynomial of lesser degree .

So far, we know that -3 and 4-i are zeros of the function f. Note that we are missing two zeros. But, since complex numbers are zeros of polynomial only by pairs (that is the number and its conjugate are zeros), then, we must have that one of the missing 2 zeros is a real number. We have 4-i as a zero, then, its complex conjugate must be also a zero, i.e 4+i is a zero.

8 0
3 years ago
A shoemaker bought 30 pairs of heels. How many individual heels did the shoemaker buy?
vfiekz [6]
<span>So we want to know how many individual heels did the shoemaker bought if he bought 30 pairs of heels. So to get to the answer we must know that one pair of heels is equal to two individual heels. So now we can calculate the individual number of heels: 30 pairs * 2 = 60 individual heels. </span>
7 0
3 years ago
find the height difference between the top of mt Everest 8848 metres and the Mariana Trench 10911 metresbelow sea level
zhuklara [117]
Mount\ Everest\to+8,848m\\\\Mariana\ Trench\to-10,911m\\\\Difference:|-10,911-8,848m|=|-19,759|\\\\\center={\boxed{19,759\ (m)}}\leftarrow answer
6 0
3 years ago
Overview of transformation
Tatiana [17]
Transformation gives you powers like no man before
3 0
2 years ago
Other questions:
  • A set of problems on Algebra, Geometry, and Combinatorics consists of 52, 70, and 88 problems. If 2 more problems from each cate
    6·2 answers
  • Solve the equation for all values of x: (x+1)^2=-49
    10·1 answer
  • How to write 0.326 in two other forms?
    9·1 answer
  • The price of a baseball cap is $9.00 plus $0.78 tax. Which expression could be used to find the cost of 5 caps?
    11·1 answer
  • When the consumer price index (cpi) decreases from 250 to 150, prices decrease by 100%. True or false?
    8·1 answer
  • A department store is having a 15% off sale on all winter coats. You purchase a winter coat for $275. The department store is lo
    13·1 answer
  • Write an expression equivalent to the given expression of 5x - 2
    5·1 answer
  • What is the midpoint of the segment shown below?
    10·1 answer
  • If you work an extra 3 hours a week for a year and you make $14 an hour, how much would you accumulate over a year?
    6·2 answers
  • F(x)=√x<br> g(x) = √ 2 - x, find (fºg)x.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!