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3 years ago

2x+3y = -33 3x+6y=-57 using elimination

1 answer:

4 0

$\left\{\begin{array}{ccc}2x+3y = -33&\text{multiply both sides by 3}\\3x+6y=-57 &\text{multiply both sides by (-2)}\end{array}\right\\\\\underline{\left\{\begin{array}{ccc}6x+9y=-99\\-6x-12y=114 \end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-3y=15\qquad\text{divide both sides by (-3)}\\.\qquad y=-5\\\\\\\text{Put the value of y to the first equation}\\\\2x+3(-5)=-33\\2x-15=-33\qquad\text{add 15 to both sides}\\2x=-18\qquad\text{divide both sides by 2}\\x=-9$

$Answer:\ x=-9\ and\ y=-5\to(-9,\ -5)$

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Traduce el enunciado a expresión algebraica La suma de dos números pares consecutivos

garri49 [273]

Answer:

The answer is "Expression: x+(x+2)".

Step-by-step explanation:

Given:

The sum of two consecutive even numbers

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Let,

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Calculating value by adding value:

Expression:

$\Rightarrow x+(x+2)\\\\$

when x= 1, 2, 3 .... it gives:

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luda_lava [24]

Answer:

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Step-by-step explanation:

7/15 because 7+2+6=15 and there are 7 dimes so 7/15.

6/15 because there are 15 coins and there are 6 pennies so 6/15.

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neonofarm [45]

Try this suggested example.

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galina1969 [7]

Answer:

○ A. Graph C

Step-by-step explanation:

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