Joseph's meal came to $18.35 and Jayden's meal came to $21.40. Jayden paid for both meals and left a 15% tip. What is the total cost of both meals, including tip?

Solved

Show answers

Ответ:

sbelgirl2000

22.05.2020

Mathematics

maximum area is 9 square units

Step-by-step explanation:

area equation is $f(x)= -(x-3)^{2} +9\\$

find the derivative of the area equation and equate to 0

$-((x-3)(x-3)) +9\\-(x^{2} -6x+9)+9\\-x^{2} +6x-9+9\\-x^{2} +6x\\ derivative=-2x+6$

take the derivative and equate to 0

$-2x+6=0\\2x=6\\x=3\\$

Use this x value to evaluate the function $f(x)= -(x-3)^{2} +9\\$

= -(3-3)^2 +9

=0+9

=9 square units (this is the maximum area)

0,0(0 оценок)

Ask your question to the AI advisor

Ai-bot is an expert in any field and is the perfect companion for reliable and useful answers and advice on a variety of topics, including science, history, technology, art, sports, health, culture and more.

Ask your question

More tips

Answers on questions: Mathematics

Ask an AI advisor a question

I want advice

Joseph's meal came to $18.35 and Jayden's meal came to $21.40. Jayden paid for both meals and left a 15% tip. What is the total cost of both meals, including tip?​