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Ipatiy [6.2K]
4 years ago
6

Which expression is equivalent to the square root of 120x

Mathematics
1 answer:
iren [92.7K]4 years ago
5 0
(120x)^1/2 see attached photo for steps

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Mai wants to make an open top box by cutting out corners of a square piece of cardboard and folding up the sides. The cardboard
Bumek [7]

Answer:

V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

The domain for x is all real numbers greater than zero and less than 5 com

Step-by-step explanation:

<em><u>The question is</u></em>

What is the volume of the open top box as a function of the side length x in cm of the square cutouts?

see the attached figure to better understand the problem

Let

x -----> the side length in cm of the square cutouts

we know that

The volume of the open top box is

V=LWH

we have

L=(10-2x)\ cm

W=(10-2x)\ cm

H=x)\ cm

substitute

V(x)=(10-2x)(10-2x)x\\\\V(x)=(100-40x+4x^{2})x\\\\V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

Find the domain for x

we know that

(10-2x) > 0\\10> 2x\\ 5 > x\\x < 5\ cm

so

The domain is the interval (0,5)

The domain is all real numbers greater than zero and less than 5 cm

therefore

The volume of the open top box as a function of the side length x in cm of the square cutouts is

V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

5 0
3 years ago
How many flags can be made from 116 1/4 yards of fabric if each flag requires to 2 2/9 yards
drek231 [11]
116 1/4 = 465/4 and 2 2/9 = 20/9
(465/4)÷(20/9) will be the answer and it is equal to 52 flags
4 0
3 years ago
Read 2 more answers
You can flip a coin twice find the probability that at least one of the tosses showed heads
Phantasy [73]

Answer:3/4


Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
Two employees are painting a boat. One uses ¾ gallon of paint each hour, one uses 1 ⅔ gallon of paint every 2 hours. How much pa
Ad libitum [116K]
<h2>Hello!</h2>

The answer is:

First employee: 3 gallons

Second employee: 3 1/3 gallons

Total: 3+3\frac{1}{3}=3+\frac{10}{3}=\frac{19}{3}

<h2>Why?</h2>

From the statement we know:

First employee uses 3/4 gallon each our, for 4 hours the will use:

\frac{3}{4}*4=\frac{12}{4}=3 gallons

Second employee uses 1 2/3 (5/3) gallon every 2 hours, meaning 5/6 gallon each hour.

\frac{5}{6}*4=\frac{20}{6}=\frac{10}{3}=3\frac{1}{3}gallons

Remember, to sum (algebraic sum) fractions we should follow the next steps:

First: Multiply both fractions denominators by each other in order to get the denominator of the new fraction.

Second: Multiply the numerator of the first fraction by the denominator of the second fraction.

Third: Multiply the denominator of the first fraction by the denominator of the second fraction.

Fourth: Sum (algebraic sum) each result and divide it into the number obtained from the first step (denominator of the new fraction).

Example:

3+\frac{1}{3} =\frac{(3*3)+(1*1)}{3*1}=\frac{9+1}{3}=\frac{10}{3}

Have a nice day!

5 0
3 years ago
Can someone PLEASE break down the percent increase and decrease I´m in 7th grade and my teacher has been out so I can´t really t
In-s [12.5K]

Answer:

<em>"First, work out the difference (decrease) between the two numbers you are comparing. Decrease = Original Number - New Number. Next, divide the decrease by the original number and multiply the answer by 100. % Decrease = Decrease ÷ Original Number × 100. If the answer is a negative number, this is a percentage increase."</em>

5 0
3 years ago
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