38 pages of the book will cost $57.
Data;
- number of page = 20
- cost = $30
<h3>Proportions</h3>
To solve this question, we have to know the cost of one page of the book.
In the first scenario, 20 pages cost $30, let's find the cost of one page here.

We can confirm our answer here by testing with the second scenario;

Now can say that one page of the book cost $1.5, let's divide 57 by this to determine the number of pages

From the calculations above, 38 pages of the book will cost $57.
Learn more on proportions here;
brainly.com/question/18437927
The 1st choice is the correct one.
Isabel is correct because the y-intercept of Line B is (0, 9) and the value of y when x = 0 in Parabola A is 9.
Hi there! The answer is 12.6
First we need to change the percentage into a decimal. To convert this percentage, we have to divide it by 100.

Hence, to find 3 percent of 420, we must multiply 420 by 0.03. We get the following:

~ Hope this helps you!
Answer:
C
Step-by-step explanation:
Each term in the second factor is multiplied by each term in the first factor, that is
- 2x(- 4x - 3) - 9y²(- 4x - 3) ← distribute both parenthesis
= 8x² + 6x + 36xy² + 27y² → C