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Delvig [45]
3 years ago
11

The length and width of a rectangle must have a sum of 80. Find the dimensions of the rectangle that will have the maximum area.

​ [Hint: Let x and 80−x be the length and width. The area can be described by the function ​f(x)=​x(80−​x).]

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
6 0
I hope this helps you

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Find all solutions in the interval [0, 2π). (sin x)(cos x) = 0
Deffense [45]
\bf sin(x)cos(x)=0\implies 
\begin{cases}
sin(x)=0\\
\measuredangle x=sin^{-1}(0)\\
\measuredangle x=0\ ,\ \pi \\
----------\\
cos(x)=0\\
\measuredangle x=cos^{-1}(0)\\
\measuredangle x=\frac{\pi }{2}\ ,\ \frac{3\pi }{2}
\end{cases}
3 0
3 years ago
Read 2 more answers
Sophia started a lawn mowing business and charges a flat fee of $5.00 plus $3.50 per hour.
umka2103 [35]

Answer:

5 + 3.5h = 29.50

Step-by-step explanation:

The flat fee means that you will be paid the money with no change to it.

So you will not multiply it.

3.5h means that you are adding 3.50 every hour according to the question

So summary:

5+3.5h = 29.50

Evaluation:

5+3.5h = 29.50

24.50 = 3.5h

h = 7

Sofia worked 7 hours

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

4 0
3 years ago
4.)star liked to practice her number sense when possible. She
Wittaler [7]

Answer:

56 + 17

Step-by-step explanation:

The numbers could be

56 + 17   because Star was separating how she added the decimal places

She added the tens units first and then the ones units last.

so   50 + 10   first

and then 6 + 7

5 0
3 years ago
Why can't you have a shoe size of 4.5 and a height of 72 inches?
liq [111]

Answer:

Ok, lemme say something.

4.5 shoes are for 9 inch feet.

Dont think a 6 foot person is gonna fit tbh.

Step-by-step explanation:

A shoe size is for relation to feet size. Your feet grow from your height too, along with weight. If you are 6 feet, your feet are gonna be more than at least 1 foot.

4.5 shoes are for 9 inch feet

1 foot = 12 inches.

12 > 9.

12-9=3.

5 0
3 years ago
Can someone help me find the value for x
nikitadnepr [17]
I would say it could be 35
6 0
3 years ago
Read 2 more answers
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