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?

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:

In what month(s) were 25 toys sold?

Therefore,

S = 25

Substitute S = 25 in above function

Thus no solution occurs

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

the answer is d on edge

step-by-step explanation: