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

A circuit consists of a capacitor of 2 F and a resistor of 1000 Ω. An alternating current e.m.f of 12 V and a frequency 50 Hz is applied. Find; (i) the current
(c) The town of Hornsdale in Australia has electricity supplied by a huge battery. On one day the battery transferred 3.24 x 1011 J of energy to the town. The p
The tallest point in England is 3209ft above sea level. The lowest point in England is -9.8ft below sea level. What is the difference between the tallest and lo
2/3 of 2 how do i get this answer
What is the size of ABC shown in the above figure
Write a memo to inform the authority about the problems faced by computer centre regarding the installation of new equipment in the centre
Carly recorded the number of food items bought at different prices at a supermarket using the histogram below. Which measure of variability would be best to
How much gravity does it require to stop time
Ella manages a cafe. One morning, she sells the following drinks 41 large coffees 4 regular hot chocolates 28 large teas A total of 9 hot chocolates A total of
If AC = 32 and BC = 24, find AB.