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Nadya [2.5K]
3 years ago
11

Expand the polynomials and simplify. (2x+3y)^2

Mathematics
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

4x^2+12xy+9y^2

Step-by-step explanation:

brainliest

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The perimeter of a rectangle is 150 cm. the length is 4 cm greater than the width find the width and length
Fudgin [204]

Let's call the width of our rectangle w and the length l. We can say l = w + 4, since the length is equal to 4 cm greater than the width.


Also remember that the perimeter of a rectangle is the sum of two times the width and two times the length, or P = 2l + 2w. To solve this problem, we can substitute in the information we know, as shown below:

150 = 2(w + 4) + 2w

150 = 4w + 8

142 = 4w

w = \frac{71}{2}


Now, we can substitute in the width we found into the formula for length, which is l = w + 4:

l = \frac{71}{2} + 4

l = \frac{79}{2}


The width of our rectangle is \boxed{\frac{71}{2} \,\, \textrm{cm}} cm and the length of our rectangle is \boxed{\frac{79}{2} \,\, \textrm{cm}}

8 0
3 years ago
2.1 liters of coffee were equally distributed to 30 cups how many millimeters of coffee were in each cup
sattari [20]

Answer: 70 ml of coffee in each cup


Step-by-step explanation:

1 liter = 1000 ml

Amount of coffee given = <em>2.1 liters</em>

\Rightarrow <em>2.1 liters =  2.1 * 1000 = 2100 ml</em>

Total number of cups = 30

\therefore Amount of coffee in each cup = \frac{Total\ amount \ of \ coffee}{number\ of  \ cups} = \frac{2100}{30} =70

<em>∵ Amount of coffee in each cup </em>= <u>70 milliliters</u>

4 0
3 years ago
Read 2 more answers
Find the value of X. Round to the nearest tenth HELP ASAP!!!!
ZanzabumX [31]

Answer: 22.5

Step-by-step explanation:

\sin 64^{\circ}=\frac{x}{25}\\\\x=25 \sin 64^{\circ}\\\\x \approx 22.5

7 0
2 years ago
Draw a model of square root of 12 using perfect squares
Shkiper50 [21]

Answer:

The answer is "\sqrt{12} is not a perfect square".

Step-by-step explanation:

12 is not a perfect square because it is the natural number, and no other natural number would square the number 12, that's why it is not a perfect square.

If we calculate the square root of \sqrt{12}. so, it is will give 2\sqrt{3} that is not a perfect square root which can be described as follows:

\Rightarrow \sqrt{12}= \sqrt{2\times 2\times 3}

            = \sqrt{2^2\times 3}\\\\= 2\sqrt{3}\\\\

\bold{\sqrt{12}} is not a perfect square root.

7 0
3 years ago
Read 2 more answers
HELP MATH PLEASE QUICK
yulyashka [42]

Answer:

15.7

Step-by-step explanation:

7 0
2 years ago
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