3 years ago

Choose the ordered pair that is a solution to the system of equations. 3x - y = 9 2x + y = 6

Mathematics

1 answer:

Inessa [10]3 years ago

7 0

The answer is (3,1), hope that helps

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Solve for X, will mark as brainliest!<br><br> 6(1+x)+x=-14

Nutka1998 [239]

Answer:

X is equal to -10

Step-by-step explanation:

#1. Multiply 6 to (1+x). Doing this makes this equation: 6+6x+x=-14

#2. Then add 6x and x to get: 7x+6=-14

#3. Then move 6 to other side of equation, while at the same time, changing it's absolute value: 7x=-14-6

#4. now you have: 7x=-20, now just divide 7 by -20 WooHoo! You finished it! you have: -2.85714285714 or 2 and 43/50.

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3 years ago

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Please Help me! Marvin worked for 3 days. He earned $87.20 each day. He uses his earnings to buy four chairs. If he has no money

Molodets [167]

Answer:

21.8

Step-by-step explanation:

87.2 divided by 4

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3 years ago

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What is the perimeter of the triangle in centimeters

Elena-2011 [213]

Answer:

Step-by-step explanation:

1 in= 2.54 cm

3in=7.62 cm

5in= 12.7cm

7in = 17.78 cm

7.62+12.7+17.78=38.1

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3 years ago

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Is this relation a function?

Sliva [168]

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True

Step-by-step explanation:

First two points are inverse of last two points, all points reflects each other over y = -x

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3 years ago

Andrew knows that exactly two of the equations $x(3+4)=4(x+3),$ $4x+5=3(x+2),$ and $(x+2)+5(x-1)=3(x+3)$ are true. What is the v

iris [78.8K]

Answer:

$4$

Step-by-step explanation:

The equations are

$x(3+4)=4(x+3)\\\Rightarrow 7x=4x+12\\\Rightarrow x=\dfrac{12}{7-4}\\\Rightarrow x=4$

$4x+5=3(x+2)\\\Rightarrow 4x+5=3x+6\\\Rightarrow x=1$

$(x+2)+5(x-1)=3(x+3)\\\Rightarrow x+2+5x-5=3x+9\\\Rightarrow 6x-3=3x+9\\\Rightarrow 3x=12\\\Rightarrow x=4$

The two equations that are true are $x(3+4)=4(x+3)$ and $(x+2)+5(x-1)=3(x+3)$ and the value of $x$ is $4$ .

7 0

3 years ago