The total cost function is the sum of the two given functions, and this is equal to:
c(t) = 190 + 70*t
<h3>
How to find the linear function for the total cost?</h3>
We know that:
- The plumber charges p(t) = 115 + 25*t
- The electrician charges e(t) = 55*t + 75.
If she hires both of them for the same time t, then the total cost function will be given by the sum of the two above functions, we will get:
c(t) = p(t) + e(t)
c(t) = (115 + 25*t) + (55*t + 75)
c(t) = (115 + 75) + (55*t + 25*t)
c(t) = 190 + 70*t
If you want to learn more about linear functions, you can read:
brainly.com/question/4025726
R=23 because its slope the formula is Y-Y/X-X
Answer:
32
Step-by-step explanation:
A=bh
b-8
h-4
A= 8 x 4
A=32
Price of the book in her store is $ 25
<em><u>Solution:</u></em>
Given that, The bookstore buys a book for 20$
She marked up the price by 25% to sell it in her store
To find: Price of book in her store
From given,
Cost price = $ 20
Markup rate = 25 %
Which means, 25 % of $ 20 is markup price
Thus markup price is $ 5
Price of the book in her store = cost price + markup price
Price of the book in her store = 20 + 5 = 25
Thus Price of the book in her store is $ 25
