avm616
contestada

P varies inversely with x. If P = 14 when x= 16, find the value of P when x = 21.
A. 224
B. 21/16
C. 32/3
D. 4,704

Respuesta :

Answer:

Option C. 32/3

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form [tex]p*x=k[/tex] or [tex]p=k/x[/tex]

we know that

For p=14, x=16

Find the value of k

[tex]k=p*x[/tex]

substitute the values

[tex]k=(14)*(16)=224[/tex]

so

The equation is equal to

[tex]p=\frac{224}{x}[/tex]

Find the value of p when x=21

substitute the value of x in the equation

[tex]p=\frac{224}{21}[/tex]    

simplify

Divide by 7 both numerator and denominator

[tex]p=\frac{32}{3}[/tex]