Seudónimo Seudónimo
  • 03-03-2016
  • Mathematics
contestada



If y is proportional to x and y = -15 when x = -20, what is the value of x when y = 12?

Respuesta :

Alex66 Alex66
  • 03-03-2016
y= k·x
if y= -15 and x= -20
⇒ -15 = k·(-20)
⇒ k = -15/-20 
⇒ k = 3/4

What is the value of x when y=12 ?

x= ?
k= 3/4
y = 12

y = kx
⇒ x = y/k
⇒ x = 12/(3/4)
⇒ x = 12· (4/3)
⇒ x = 16

Answer Link

Otras preguntas

Colin put some buttons on a table. There were 4 blue buttons, 5 red buttons, 7 tan buttons, and 8 white buttons. Colin's cat jumped up and knocked 1 button onto
Solve 7p+5q=19p+12 for p
Write an equation of the line below.
Which of the following is a surface barrier to infection? skin antibodies antigens lymph nodes
​a corporation has all the rights and responsibilities of _____.
What change of state is occurring during condensation? A gas is cooled to its boiling point and becomes a liquid. A solid is heated to its melting point
Which are the primary causes of acidic deposition? radon gas and fuel wood smoke soil dust and sand carbon monoxide and formaldehyde tropospheric ozone sulfur a
"what does carl jung call the models that help us understand experiences and deal with the difficult task of being human?"
30 POINTS!!!!! PLEASE ANSWER MATH PROBLEM CORRECTLY!!!!! VERY EASY MATH PROBLEM!!!!!!!! Marie is thinking of a multiple of 63, while Jay is thinking of a factor
What are the domain and range of the real-valued function f ( x ) = − x 2 − 3?