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
Bond [772]
3 years ago
14

We could use all the help we can get. I can't find the Khan academy videos associated with my work and I'm struggling. any help

is appreciatled

Mathematics
1 answer:
vladimir1956 [14]3 years ago
6 0

Answer:

#7.

The domain is {-3,0,4}

the range is {-5,0,1,7}

not a function

#8

D={3,6,12,18}

R={5,7,9,10}

not a function

Step-by-step explanation:

First, 7.

the domain is the all of the x values, in numerical order, listed once, even if it repeats.

D={-3,0,4} (notice how -3 is listed twice; despite that, we only list it once)  

the range is all of the y values, in numerical order, listed once, even if the numbers repeat

R={-5,0,1,7}

A function can have the range (y values) repeat, however, the domain (x values) cannot repeat.

Therefore, this is not a function, since -3 is listed twice.

For 8.

The domain, can be listed as

D={3,6,12,18}

And the range as

R={5,7,9,10}

Notice how it says that if 6 is the input (x), the output (y) can be 5 or 10. Since we said the domain CANNOT repeat, this isn't a function.

Hope this helps!

You might be interested in
Use lagrange multipliers to find the point on the plane x − 2y + 3z = 6 that is closest to the point (0, 2, 5).
horsena [70]
Lagrangian:

L(x,y,z,\lambda)=x^2+(y-2)^2+(z-5)^2+\lambda(x-2y+3z-6)

where the function we want to minimize is actually \sqrt{x^2+(y-2)^2+(z-5)^2}, but it's easy to see that \sqrt{f(\mathbf x)} and f(\mathbf x) have critical points at the same vector \mathbf x.

Derivatives of the Lagrangian set equal to zero:

L_x=2x+\lambda=0\implies x=-\dfrac\lambda2
L_y=2(y-2)-2\lambda=0\implies y=2+\lambda
L_z=2(z-5)+3\lambda=0\implies z=5-\dfrac{3\lambda}2
L_\lambda=x-2y+3z-6=0

Substituting the first three equations into the fourth gives

-\dfrac\lambda2-2(2+\lambda)+3\left(5-\dfrac{3\lambda}2\right)=6
11-7\lambda=6\implies \lambda=\dfrac57

Solving for x,y,z, we get a single critical point at \left(-\dfrac5{14},\dfrac{19}7,\dfrac{55}{14}\right), which in turn gives the least distance between the plane and (0, 2, 5) of \dfrac5{\sqrt{14}}.
7 0
3 years ago
Find the range of each function for the given domain-
aleksklad [387]

Answer:

42

90

Step-by-step explanation:

ieieieeieeirieiejejejjdjdjdfhdhrhrhrurur

7 0
3 years ago
-6=-8+<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bp%7D%7B11%7D%20" id="TexFormula1" title=" \frac{p}{11} " alt=" \frac{p}
vekshin1
P=22 rewrite the question as -8+p/11=-6 then move all terms not containing p to the right side p/11=2 multiply both sides of the given equation by 11, the reciprocal, 11*p/11=11*2
8 0
2 years ago
(9/ 4)/ 18 = 9/ (4 /18) A.True B.False
kotegsom [21]
False

<span>(9/ 4)/ 18
= 9/4 * 1/18
= 9/72
= 1/8 </span>
5 0
3 years ago
Solve the following equation by combining like terms:<br> 4y - 2y = 18
Lelechka [254]

Answer:

y = 9

Step-by-step explanation:

Collect the like terms:

2y = 18

Divide both sides by 2 to make y on its own

y = 9

8 0
3 years ago
Read 2 more answers
Other questions:
  • The vertex of the graph of y=(x-1)^2-5 is
    10·2 answers
  • The number of people waiting in a line to buy tickets x minutes after a ticket booth opened is given by the expression 70−5x .
    8·2 answers
  • What's the eleventh term of a sequence with an explicit rule of ƒ(n) = 2 + 3(n – 1)?
    11·1 answer
  • Consider the system of equations. y = −2x + 4 y = − 1/3x − 1
    7·1 answer
  • What is the midpoint 50 150
    10·1 answer
  • What is the zero of this polynomial HELP!
    12·1 answer
  • WHENS MY BDAY I SAID THIS
    7·1 answer
  • Martin is throwing a little get together with his friends and goes to the corner store to buy some candy bars
    6·1 answer
  • The seniors at three high schools were surveyed about their plans after graduation. The following table shows the responses, cla
    10·1 answer
  • Which equation has no solution ?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!