ellie6705 ellie6705

03-01-2018
Mathematics

contestada

If y varies directly with x and y=30 when x=-10, find the value of x when y=4

A. -4/3
B. 4/3
C. -3
D. -12

Explain

Respuesta :

habeebmusa24 habeebmusa24

03-01-2018

If y∞x then y=kx where k is constant to find k
k=y/x then substitute the values
k=30/-10=-3 to find x when y is 4
x=y/k=4/-3=-4/3 option A

Answer Link

Otras preguntas

The “contagion effect” refers to (A) the way terror spreads after a terrorist act.(B) the spread of biological or chemical weapons of mass destruction.(C) the f

One gear turns 33\frac{1}{3} times in a minute. Another gear turns 45 times in a minute. Initially, a mark on each gear is pointing due north. After how many se

A sample of 3 different bulbs is randomly selected from a group containing 8 that are defective and 22 that have no defects. What is the probability that at lea

Paul began his speech as follows: They called Lou Gehrig the iron horse. The tireless worker played an astounding 2,130 consecutive baseball games even though h

What is the temperature of 13.3 moles of carbon dioxide that occupies 6 m3 and applies a pressure of 23 kPa to its container?

You observe a plane approaching overhead and assume that its speed is 600 miles per hour. The angle of elevation of the plane is 19° at one time and 59° one min

Jeanne is 54 years old. She had worked as a medical research librarian for ten years before quitting in her late forties. She wants to re-enter the workforce. H

what are the coefficents in the expansion of (x+y)^4

Referred pain may be perceived at some distance from the area of tissue injury, but generally felt a. with slightly less intensity. b. within 10 to 15 cm area.

Dale is trying to buy a Dr. Pepper from a vending machine. When he pushes the button nothing happens. Dale pushes the button multiple times over the course of t