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Paha777 [63]
3 years ago
6

3x+2y=4 4x+5y=17 What is the value of x and y?

Mathematics
2 answers:
andrew-mc [135]3 years ago
8 0
3x+2y=4|\cdot(-4)\\
4x+5y=17|\cdot 3\\\\
-12x-8y=-16\\
\underline{12x+15y=51}\\
7y=35\\
y=5\\\\
3x+2\cdot5=4\\
3x+10=4\\
3x=-6\\
x=-2\\\\
\boxed{(x,y)=(-2,5)}
Fudgin [204]3 years ago
5 0
{3x+2y=4    /*5
{4x+5y=17    /*(-2)

{15x+10y=20
<u>{-8x-10y=-34        </u>(+)
<em>7x=-14</em><em />
<em>x=-2</em>

15x+10y=20
15*(-2)+10y=20
-30+10y=20
10y=50
<em>y=5</em>

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Oduvanchick [21]

Answer:

6ab + b^2 - 17a - 4b + 10

Step-by-step explanation:

-2(a+b-5)+3(-5a+2b)+b(6a+b-8)

Now we break the parenthesis. To break that, we multiply each of the value inside the parenthesis by the adjacent number. That is, for the first part of the expression, we multiply by -2, then by 3, and then by b.

Algebraic Operations need to be considered:

[ (-) x (-) = (+); (-) x (+) = (-)]

= [-(2*a) + (-2*b) - (-2*5)] + [3*(-5a) + (3*2b)] + [(b*6a) + (b*b) - (b*8)]

= -2a - 2b +10 -15a + 6b + 6ab + b^2 - 8b

Now, we will make the adjustment by the similarity value.

= - 2a - 15a - 2b + 6b - 8b + 6ab + b^2 + 10

= - 17a - 4b + 6ab + b^2 + 10

= 6ab + b^2 - 17a - 4b + 10

Therefore, the answer of the expression is = 6ab + b^2 - 17a - 4b + 10

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3 years ago
How can "12 of 40" be written as a simplified ratio?
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<h3>✽ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ 12 : 40

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<h3><u>✽</u></h3>

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Softa [21]

Answer:

$73.60

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simple interest = amount deposited x time x interest rate

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600 + (600 x 0.055 x 5) > $2000

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