natalie35 natalie35

18-05-2016
Mathematics

contestada

y varies inversely with x. If y = 40 when x = 16, find x when y =-5.

y varies inversely with x If y 40 when x 16 find x when y 5 class=

Respuesta :

apologiabiology apologiabiology

18-05-2016

y varies directly with x m eans
y=kx where k is constant

y=40
x=16
find k
40=k16
divide both sides by 16
5/2=k

y=5/2x

y=-5 find x
-5=5/2x
times 2/5 both sides to cancle fraciton (5/2 times 2/5=10/10=1)
-10/5=x
-2=x

x=-2

Answer Link

Otras preguntas

Q1. Solve the linear equation a) y - 3 = -5

state and prove mid point theorem

Sara got 720 marks out of 800 in the Basic Level Examination. How many percent of marks did she obtain?

PLEASE HELP! WILL GET BRAINLY!!

A classmate said 4(3x) = 12x, is this student correct?

Some help in this problem pls

Item 7 Question 1 Select the equation that represents the question. What percent of 300 is 51? 300=51×p 51=p×300 300=p×51 p=300×51 Question 2 Solve the equation

21) Find x. Show your work.

A high school track team's long jump record is 24 ft 9 1/4 in. This year, Arthur's best long jump is 24 ft 3 1/2 If long jumps are measured to the nearest qu

A student lifts an apple to a height of 1 m. The apple weighs 1 N. How much work does the student do on the apple?