A new toy hits the local store. Sales (in tens) increase a steady rate for several months, then decrease at about the same rate. This can be modeled by the function S(m)=−0.625|m−8|+5 In what month(s) were 25 toys sold?

Respuesta :

Absolute value cannot be less than 0. No solution

Solution:

Given that,

A new toy hits the local store

Sales (in tens) increase a steady rate for several months, then decrease at about the same rate

This can be modeled by the function:

[tex]S(m) = -0.625 |m - 8| + 5[/tex]

In what month(s) were 25 toys sold?

Therefore,

S = 25

Substitute S = 25 in above function

[tex]25 = -0.625 | m - 8| + 5\\\\25 - 5 = -0.625 | m - 8|\\\\20 = -0.625 | m - 8|\\\\| m - 8| = -32[/tex]

[tex]\mathrm{Absolute\:value\:cannot\:be\:less\:than\:0}[/tex]

Thus no solution occurs

Answer:

4 and 12

Step-by-step explanation:

Use 2.5 because the sales are in tens so the 25 is divided by 10

2.5 = -0.625|x-8|+5
-2.5/-0.625=|x-8|
4=|x-8|

+-4=x-8
x=4, 12