Answer:
$85
Step-by-step explanation:
Rachel will earn $85 because her hourly wage is $8.5.
Hope this helps! c:
Answer:
Therefore he should sell 25 units of tacos to minimize his cost .
The minimum cost is $240.
Step-by-step explanation:
Given function,

where C is the cost in dollar to sell x units of tacos.
We know that,
If a function y(x)= ax²+bx+c,
then the function is minimum at 
Here a= 1 , b= -50 and c= 865.
Therefore

Therefore he should sell 25 units of tacos to minimize his cost .
putting the value of x in the given function
C(25)=25²-(50×25)+865
=240
The minimum cost is $240.
Answer:
8b-5=6b+23
8b-6b=23+5
2b=28
b=14
Step-by-step explanation: