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3 years ago

Simplify 2m - [n - (m - 2n)]. -3m - n 3m - n -3m - 3n 3m - 3n

Mathematics

2 answers:

leonid [27]3 years ago

8 0

Answer:

3m - 3n

Step-by-step explanation:

zhenek [66]3 years ago

4 0

Answer:

3m-3n

Step-by-step explanation:

We want to simplify the expression;

2m - [n - (m - 2n)].

We expand the parenthesis to obtain;

2m - (n - m + 2n)

2m - ( - m + 3n)

Expand further to get;

2m +m -3n

Combine the first two terms;

3m-3n

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HELP!!!!

Vladimir [108]

So I really don’t know

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3 years ago

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Almost done!!! Appreciate the help

laila [671]

Using the formula for the distance between two points to find the side lengths, the perimeter of the polygon is of 25 units.

<h3>What is the perimeter of a figure?</h3>

The perimeter of a figure is given by the sum of the side lengths of it's outside dimensions.

<h3>What is the distance between two points?</h3>

Suppose that we have two points, $(x_1,y_1)$ and $(x_2,y_2)$ . The distance between them is given by:

$D = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

For this problem, the distances are given as follows:

$D_1 = \sqrt{(-1 -(-1))^2 + (6 - 3)^2} = 3$ .

$D_2 = \sqrt{(2 -(-1))^2 + (10 - 6)^2} = 5$ .

$D_3 = \sqrt{(5 - 2)^2 + (6 - 10)^2} = 5$ .

$D_4 = \sqrt{(5 - 5)^2 + (3 - 6)^2} = 6$ .

$D_5 = \sqrt{(5 - (-1))^2 + (3 - 3)^2} = 6$ .

Hence the perimeter is given by:

P = 3 + 2 x 5 + 2 x 6 = 25 units.

More can be learned about the perimeter of a figure at brainly.com/question/18610622

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2 years ago

Which rate is the lowest price? $5.60 for 8 $4.80 for 6 $4.50 for 5 $0.75 each

Jet001 [13]

You can calculate percentages by first finding what 10% of a value is and then what 5 or 1% is. From there you can multiply to find multiples and then add to get the required percentage. The example below shows this.

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3 years ago

a bus travels for 2 2/3 hours at the speed of 36 miles per hour. find the distance traveled usingvthe formula d=rt

Dmitry [639]

Answer:

Step-by-step explanation:

$t=2\dfrac{2}{3}\ h=\dfrac{2\cdot3+2}{3}\ h=\dfrac{8}{3}\ h\\\\r=36\ mph\\\\\text{Substitute to}\ d=rt:\\\\d=36\!\!\!\!\!\diagup^{12}\ \dfrac{mi}{h\!\!\!\!\diagup}\cdot\dfrac{8}{3\!\!\!\!\diagup_1}\ h\!\!\!\!\diagup=(12\ mi)(8)=96\ mi$

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3 years ago

Francine uses 2/3 cup of pineapple juice for every 1/3 cup of orange juice to make a smoothie , how many cups of pineapple juice

chubhunter [2.5K]

we know that

Francine uses $2/3$ cup of pineapple juice for every $1/3$ cup of orange juice to make a smoothie

by proportion

Find the number of cups of pineapple for one cup of orange juice

$\frac{(2/3)}{(1/3)} \frac{cups\ pineapple}{cups\ orange} =\frac{x}{1} \frac{cups\ pineapple}{cups\ orange}\\ \\x*(1/3)=(2/3) \\ \\x=2\ cups\ pineapple$

therefore

the answer is

$2\ cups\ pineapple\ juice$

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3 years ago

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