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Mazyrski [523]
3 years ago
10

Một dàn gà có 24 con gà trống và bằng 6 phần 5 số con gà mái. Tỉ số giữa số gà mái và số con gà của đàn.

Mathematics
1 answer:
FromTheMoon [43]3 years ago
5 0

Step-by-step explanation:

Số gà mái: 24 : 6 x 5 = 20 (con)

Số gà cả đà: 24 + 20 = 44 (con)

=> Tỉ số giữa gà mái và số gà của đàn: 20/44 = 5/11

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5+2 root 3 / 7+4 root 3 =a-6root3
STALIN [3.7K]

Answer:

<h2>a = 11</h2>

Step-by-step explanation:

\dfrac{5+2\sqrt3}{7+4\sqrt3}\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=\dfrac{5+2\sqrt3}{7+4\sqrt3}\cdot\dfrac{7-4\sqrt3}{7-4\sqrt3}=\dfrac{(5+2\sqrt3)(7-4\sqrt3)}{7^2-(4\sqrt3)^2}\qquad\text{use FOIL}\\\\=\dfrac{(5)(7)+(5)(-4\sqrt3)+(2\sqrt3)(7)+(2\sqrt3)(-4\sqrt3)}{49-4^2(\sqrt3)^2}\\\\=\dfrac{35-20\sqrt3+14\sqrt3-8(3)}{49-(16)(3)}=\dfrac{(35-24)+(-20\sqrt3+14\sqrt3)}{49-48}\\\\=\dfrac{11-6\sqrt3}{1}=11-6\sqrt3

8 0
3 years ago
What is the value of 4 x minus 7 when x = 4?
Kisachek [45]

Answer:

<h2>9</h2>

Step-by-step explanation:

<em>4x - 7</em>

<em>Put </em><em>x = 4</em><em> to the expression:</em>

<em>4(4) - 7 = 16 - 7 = 9</em>

5 0
3 years ago
Bill baked n cookies. His friends ate 12 of them. Using n, write an expression for the number of cookies that remained.
Flura [38]

Answer:

n-12= number of cookies left

4 0
3 years ago
Read 2 more answers
Could you add 7/12 2/3
muminat
Yes, you need to make the denominators the same. 2/3 becomes 8/12. So now you add 7/12 and 8/12, getting 15/12. But you're not done you need to simplify 15/12. The answer is 1 1/4.
4 0
3 years ago
Solve the proportion by using cross products.
algol13

Answer:

72

Step-by-step explanation:

Multiply 8 and <em>n </em>to get 8n

Multiply 3 and 192 to get 576

Write them equal to each other 8n=576

To isolate the variable divide by 8 on both sides

\frac{567}{8} =72

<em></em>

6 0
4 years ago
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