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3 years ago

Solve using substitutionx=-6x-y=-8

Mathematics

1 answer:

aleksklad [387]3 years ago

4 0

Answer:

(-6,2)

Step-by-step explanation:

$x = - 6 \\ x - y = - 8$

Substitution

Substitute x = -6 from the first equation in the second equation.

$- 6 - y = - 8 \\ - 6 + 8 = y \\ 2 = y$

Normally, we have to substitute either x-term or y-term in one of the equation to get another term. For this situation, we already know the value of x so It is not necessary to substitute the y-value.

Answer Check

We have to check the answer to make sure that we have got the right answer.

We can check the answer by substituting both x-value and y-value in the equation.

$x - y = - 8$

Substitute x = -6 and y = 2 in the equation.

$- 6 - 2 = - 8 \\ - 8 = - 8$

The equation is true. Therefore, our answer is (-6,2)

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Answer:

Part A) $x = 11$

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Step-by-step explanation:

Median of trapezium is $m=\frac{base1+base2}{2}$

In provided figure, base1 is x+12 and base2 is 3x-4

A) solve for value of x

calculate the median $m=\frac{base1+base2}{2}$

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$4x-18=\frac{4x+8}{2}$

$4x-18=2x+4$

$2x-18=4$

$2x = 18 + 4$

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B) To find the length of BC, AD and EF , put the value of x in equation of lines

length of BC = x + 12 = x + 12 = 11 + 12 =23

length of EF = 4x - 18 = 4(11) - 18 = 44 - 18 =26

length of AD = 3x - 4 = 3(11) - 4 = 33 - 4 =29

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3 years ago

What is the exact value

Viefleur [7K]

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3 years ago

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Step-by-step explanation:

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2 years ago

Ray industries bought a touchscreen monitor for $1200 it is expected to depreciate at a rate of 25% per year what was the value

max2010maxim [7]

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Since our touchscreen starts off at a value of 1200, that will be our a variable.

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3 years ago

Solve using substitutionx=-6x-y=-8​

Solve using substitutionx=-6x-y=-8