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
Anestetic [448]
3 years ago
12

The function f(x) varies inversely with x and f(x)=-15 when x=30

Mathematics
1 answer:
meriva3 years ago
3 0
F(x) is the function that represents a given equation. It is defined more specifically by rules or conditions to satisfy the whole formula/equation.

In this case, f(x) has an inverse proportion with x (e.g. f(x) = 1/x). The second parameter says that f(x) = -15 when x is 30. Given that condition, just look for the formula, among the choices, that will result to -15 when x = 30. The answer is:

D. f(x) = -450/x

This is just -450/30 = -15
You might be interested in
Can someone help me solve this?
Dovator [93]

Answer:

5 felt pads.

7 cards.

Step-by-step explanation:

Remark

  • The total number of items is 12
  • So let the felt sheets be x
  • Let the cards = y

Equations and Solution

x + y = 12

Now the price is 7.75 that she has to pay for the 12 items. She wants to come back with 0 dollars.

0.5x + 0.75y = 7.75             Multiply this equation by 2

x + 1.5y = 15.50                    write the first equation underneath and subtract.

<u>x +    y =   12</u>

      .5y =  3                          Divide by 0.5

y = 3/0.5

y = 7

So she can get 7 cards.

x + y = 12

x + 7 = 12

x = 12 - 7

x = 5

So she can buy 5 felt pads.

8 0
3 years ago
What is the solution to the system of equations? Use the substitution method.
ludmilkaskok [199]
The answer is A. (3,-1/2)
3 0
3 years ago
Having troubles with inequalities.. 3.8x + 14.5 &lt; 32
ryzh [129]
3,8x + 14.5 < 32\\&#10;3,8x
8 0
3 years ago
Read 2 more answers
7 is a factor of <br> a 28<br> b 16<br> c 11<br> d 4
Blababa [14]

Answer:

a) 28

Step-by-step explanation:

4 0
2 years ago
a. Show the sampling distribution of p, the proportion of groceries thrown out by your sample respondents.b. What is the probabi
Anika [276]

Answer:

The corresponding p - value will be  is < 0.00001 which is less than 0.05

Step-by-step explanation:

Suppose p= 0.12 and n= 540 then the standard deviation can be taken out as √p(1-p)/n= √0.12(1-0.12)/540= 0.014

For the probability that the survey will provide a sample proportion within 6.03 of the population proportion

we will find the z statistic

z= p^-p/√p(1-p)/n

But √p(1-p)/n= 0.014 and p^-p= 6.03

Putting the values

z= 6.03/0.014= 430.71

The corresponding p - value will be  is < 0.00001 which is less than 0.05

7 0
2 years ago
Other questions:
  • Jeannie is 5 years older than her younger sister April. Together, Jeannie and April’s ages add to 41. How old is April?
    6·1 answer
  • Zev read 15% of his 56-page book. Kelly read 12% of her 64-page book. Marneisha read 14% of his 68-page book Aleisha read 10% of
    7·1 answer
  • Write an equation of the line in point slope form, that passes through the two given points
    11·1 answer
  • The hour hand of a clock moves -30° every hour. How many degrees does it move in 2 1/5 hours?
    13·1 answer
  • Is Figure A congruent to Figure B? Explain.
    15·1 answer
  • −|−39| = <br> |−44|+5 = <br> 50−|−18| =
    13·2 answers
  • A tree's height increase by 15%. If a tree is 23 feet high, how tall will it be in one year ?
    7·1 answer
  • Please help. Subtract using the number line.
    10·1 answer
  • Can someone simplfy to me why we use different formula in some equations for sin cos tan? Like in some instances we swap variabl
    9·1 answer
  • You are driving on a freeway with a posted speed of 65 mph. Nearly all of the cars are traveling between 35 and 40 mph. What wou
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!