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boyakko [2]
3 years ago
10

Solve the system of equation-5x+2y=9 y=7x

Mathematics
1 answer:
tangare [24]3 years ago
7 0
X = 2y/5 - 9/5
y = 5x/2 + 9/2
(I don't know if this is correct)
Hope this helps!

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Orlov [11]

Answer:

8 to the 2 power  8

 

Step-by-step explanation:

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Which expression is equivalent to -1/12x-1/3?
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B. If you multiply 1/12 by (-x) it's -1/12x and if you multiply 1/12 by (-4) it's -4/12 which is equivalent to -1/3.
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69 points!!!
Amiraneli [1.4K]

Answer:

C)  The solution for the given system of equations are A(0,-5) and B(-4,3)

Step-by-step explanation:

The given system of equation are : x^{2}  + y^{2}  = 25\\2x  + y  = -5

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We get: x^{2}  + y^{2}  = 25  \implies x^{2}  + (-5-2x)^{2}  = 25

By ALGEBRAIC IDENTITY:

(a+b)^{2}   = a^{2}  +  b^{2}  + 2ab\\ (-5-2x)^{2} = (-5)^{2}  +  (-2x)^{2}  + 2(-5)(-2x)

or, x^{2}  + (-5-2x)^{2}  = 25  \implies x^{2} + (25  +  4x^{2}  + 20x)  = 25

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⇒ x = 0 or,   x  = -20/5 = -4

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and if x = -4, y = -5 -2(-4)   = -5 + 8  = 3

Hence, the solution for the given system of equations are A(0,-5) and B(-4,3)

8 0
3 years ago
Can someone please help You have to solve the proportions .<br> Thanks
Hoochie [10]

Answer:

40.265

Step-by-step explanation:

Divide 5 by 3 and continue dividing or mulitplying the numbers given

numbers on the top row:  Mulityply

numbers on the bottom row: Divide

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