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Rasek [7]
3 years ago
5

Simplify 5x−4y+2(y+x)

Mathematics
2 answers:
Papessa [141]3 years ago
7 0

Answer:

7x-2y

Step-by-step explanation:

First distribute 2 to numbers inside the parenthesis.

5x-4y+2y+2x

Combine like terms:

5x+2x=7x

-4y+2y=-2y

7x-2y

vagabundo [1.1K]3 years ago
4 0
Equals 7x-2y multiply the parentheses by 2
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33 1/3 of 21 (finding the percent of a number)
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<span>33% of 21=6.93 i think this is the answer</span>
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3 years ago
The area of rectangular field is 1440 sq meters and perimeter is 152 metre. Out of length or breadth which one is to be decrease
Arturiano [62]

Answer:

If Length is decreased by 10% then it would become a square.

Step-by-step explanation:

Given:

Area of Rectangular field = 1440 sq. m

Perimeter = 152 m.

We need to find which one needs to be decreased by what percentage to make it a square.

Solution:

Let length be denoted by 'l'.

Also Let width be denoted by 'w'.

Now we know that Area of rectangular field is given by Length times width.

framing in equation form we get;

l\times w = 1440 \ \ \ \ equation\ 1

Also we know that Perimeter of rectangular field is given by 2 times sum of  Length and width.

framing in equation form we get;

2(l+w) =152\\\\l+w =\frac{152}{2}\\\\l+w=76\\\\l=76-w \ \ \ \ equation \ 2

Now Substituting equation 2 in equation 1 we get;

l\times w =1440\\\\(76-w)w=1440\\\\76w-w^2=1440\\\\w^2-76w+1440 =0

Now we will find the root by factorizing the same we get;

w^2-36w-40w+1440=0\\\\w(w-36)-40(w-36)=0\\\\(w-36)(w-40) =0 \\

Now solving for each to find the value of 'w' we get;

w-36 =0\\\\w=36\\\\also \\\\w-40=0\\\\w=40

So We can say that;

Width = 36 m and Length = 40 m

Now we need to find out of length or breadth which one is to be decreased by what percentage to make it a square.

We know that square has all sides same.

So from the data we found we can say that if length is decreased by 4 then length and breadth(width) both will be equal.

So to find percentage decreased we will divide length to be decreased by total length and then multiply by 100.

framing in equation form we get;

percentage decreased = \frac{4}{40}\times 100 = 10\%

Hence If Length is decreased by 10% then it would become a square.

6 0
3 years ago
I need help ASAP I will name brainlest if you get it right and no bad answers
Dovator [93]

Answer:

1,000

Step-by-step explanation:

really sorry if wrong. But if it is wrong:

Volume= length time width time height

hope this helps!   :)

8 0
3 years ago
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​The perimeter of a square is 28 feet. What is its area<br> ​in square feet?
ruslelena [56]

Answer:

49 feet squared

Step-by-step explanation:

To find the area of the square, we have to find the dimensions. If the perimeter is 28 feet, and a square has equal sides, 28 ÷ 4 = 7

Because each side of the square is 7 feet, to find the area we multiply 7 x 7.

7 x 7 = 49

I hope that this helps! :)

4 0
3 years ago
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Help maybe please ??
Setler79 [48]

Answer: M=2?..

Step-by-step explanation:

I'm confused on what really is the quetsion, but yea bc it's bigger im guessing ? lol

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