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cluponka [151]
3 years ago
9

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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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.
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  • D_3 = \sqrt{(5 - 2)^2 + (6 - 10)^2} = 5.
  • D_4 = \sqrt{(5 - 5)^2 + (3 - 6)^2} = 6.
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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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7 0
2 years ago
Which rate is the lowest price?<br> $5.60 for 8 <br> $4.80 for 6 <br> $4.50 for 5 <br> $0.75 each
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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.

<span>What is 35% of $40?<span>Step 1<span>What is 10% of $40?10% of $40 = $40 ÷ 10 =<span> $4</span></span><span>10% is a relatively easy percentage and can be found by<span> dividing by 10</span>.</span></span><span>Step 2<span>3 x $4 = $1230% of $40 = $12</span>30% is 3 times ( 3 x) 10% so we multiply what 10% of $40 is by 3</span><span>Step 3<span>What is 5% of $40?5% of $40 = $4 ÷ 2 =<span> $2</span></span><span>5% is half of what 10% is so divide what 10% is by 2 .</span></span><span>Step 4<span>What is 35% of $40?$12 + $2 = $14</span><span>Add what</span></span></span>
3 0
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:

<h2>96 mi</h2>

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

8 0
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

so

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

<u>the answer is</u>

2\ cups\ pineapple\ juice

8 0
3 years ago
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