annaaaad annaaaad
  • 08-08-2017
  • Mathematics
contestada

If f(x) varies directly with x^2, and f(x) = 75 when x = 5, find the value of f(4). A)100 B)50 C)48 D)25

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 08-08-2017
that means f(x)=kx²

so
f(5)=75=5²k
solve for k
75=5²k
75=25k
divide by 25
3=k


f(x)=3x² is da equation

so
f(4)=3(4)²
f(4)=3(16)
f(4)=48

C is answer
Answer Link

Otras preguntas

What caused the Cold War? Written Response.
Look at this graph. What is the slope? Simplify your answer and write it as an improper fraction, proper fraction or an integer. 10
Some claim that the Internet both invades and compromises one’s right to privacy. However, this is ridiculous. The Internet is only as invasive as one allows it
Why you are interested of travel photographers – Why did you choose this job to research? Please I need help on the question
Any anime suggestions?
The points given in the table above lie on a line. Find the slope of the line.
Dbq is chocolate good for Côte d’lvoire
I need help ASAP, PLEASEEE
what is the degree of the following polynomial f(x)=(x+4)^3(x+1)(x-5)^3
Mr.franklin paid $33.20 for 8 gallons of gas. What is the price of 1 gallon of gas?