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vovangra [49]
3 years ago
15

Cho tam giác abc có góc b=60 độ cạnh b= 4cm cạnh c=5cm . tính độ dài cạnh a

Mathematics
1 answer:
Tresset [83]3 years ago
5 0

Answer:

bok

Step-by-step explanation:

bioknokkn

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Solve the system using substitution: x = -4y and x + 5y = 2<br> Please and thank you.
Novay_Z [31]

Answer:

x = - 8, y = 2

Step-by-step explanation:

x =  - 4y......(1) \\ x + 5y = 2....(2) \\ plug \: x =  - 4y \: in \: equation \: (2) \\  - 4y + 5y = 2 \\ y = 2 \\ plug \: y = 2 \: in \: equation \: (1) \\ x =  - 4(2) \\ x =  - 8\\

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Write the equation of the line that passes through (2, 3) and is parallel to the line 12x – 5y = 2.
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Jim types 1800 words in 25 minutes. How many words does he type per minute
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amm1812

Answer:

Step-by-step explanation:

Rewrite this quadratic equation in standard form:  2n^2 + 3n + 54 = 0.  Identify the coefficients of the n terms:  they are 2, 3, 54.

Find the discriminant b^2 - 4ac:  It is 3^2 - 4(2)(54), or -423.  The negative sign tells us that this quadratic has two unequal, complex roots, which are:

     -(3) ± i√423        -3 ± i√423

n = ------------------- = ------------------

             2(2)                      4

3 0
3 years ago
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